.Net: Updates to HttpPlugin

[markwallace-microsoft]

Motivation and Context

1. AllowedDomains - Provide control over which domains requests can be sent to.

Description

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the SK Contribution Guidelines and the pre-submission formatting script raises no violations
• All unit tests pass, and I have added new tests where possible
• I didn't break anyone 😄

[markwallace-microsoft]

MongoDB tests failed during merge

[xUnit.net 01:00:13.01]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.GreaterThanOrEqual_with_int [FAIL]
[xUnit.net 01:00:13.01]     MongoDBIntegrationTests.HybridSearch.MongoDBKeywordVectorizedHybridSearchTests.SearchWithTopShouldReturnExpectedResultsAsync [FAIL]
[xUnit.net 01:00:13.01]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.And [FAIL]
[xUnit.net 01:00:13.01]     MongoDBIntegrationTests.Collections.MongoDBCollectionConformanceTests.CreateCollectionCalledMoreThanOnceThrowsVectorStoreOperationException [FAIL]
[xUnit.net 01:00:13.02]     MongoDBIntegrationTests.HybridSearch.MongoDBKeywordVectorizedHybridSearchTests.SearchWithSkipShouldReturnExpectedResultsAsync [FAIL]
[xUnit.net 01:00:13.02]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Legacy_AnyTagEqualTo_array [FAIL]
[xUnit.net 01:00:13.02]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Equal_with_string_is_not_Contains [FAIL]
[xUnit.net 01:00:13.02]     MongoDBIntegrationTests.HybridSearch.MongoDBKeywordVectorizedHybridSearchTests.SearchWithMultiTextRecordSearchesRequestedFieldAsync [FAIL]
[xUnit.net 01:00:13.02]     MongoDBIntegrationTests.Collections.MongoDBCollectionConformanceTests.CreateCollectionIfNotExistsCalledMoreThanOnceDoesNotThrow [FAIL]
[xUnit.net 01:00:13.02]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Contains_over_inline_string_array [FAIL]
[xUnit.net 01:00:13.03]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Equal_with_null_captured [FAIL]
[xUnit.net 01:00:13.03]     MongoDBIntegrationTests.HybridSearch.MongoDBKeywordVectorizedHybridSearchTests.SearchWithMultipleKeywordsShouldRankMatchedKeywordsHigherAsync [FAIL]
[xUnit.net 01:00:13.03]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Legacy_AnyTagEqualTo_List [FAIL]
[xUnit.net 01:00:13.03]     MongoDBIntegrationTests.Collections.MongoDBCollectionConformanceTests.CreateCollectionCalledMoreThanOnceThrowsVectorStoreOperationException_GenericDataModel [FAIL]
[xUnit.net 01:00:13.03]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Contains_over_captured_string_array [FAIL]
[xUnit.net 01:00:13.03]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.LessThanOrEqual_with_int [FAIL]
[xUnit.net 01:00:13.03]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Equal_with_string_containing_special_characters [FAIL]
[xUnit.net 01:00:13.03]     MongoDBIntegrationTests.Collections.MongoDBCollectionConformanceTests.CreateCollectionCreatesTheCollection_GenericDataModel [FAIL]
[xUnit.net 01:00:13.03]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Not_over_Equal [FAIL]
[xUnit.net 01:00:13.03]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Contains_over_field_string_List [FAIL]
[xUnit.net 01:00:13.03]     MongoDBIntegrationTests.Collections.MongoDBCollectionConformanceTests.CreateCollectionIfNotExistsCalledMoreThanOnceDoesNotThrow_GenericDataModel [FAIL]
[xUnit.net 01:00:13.03]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Captured_variable [FAIL]
[xUnit.net 01:00:13.04]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Not_over_bool [FAIL]
[xUnit.net 01:00:13.04]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Contains_over_field_string_array [FAIL]
[xUnit.net 01:00:13.04]     MongoDBIntegrationTests.Collections.MongoDBCollectionConformanceTests.DeleteCollectionDoesNotThrowForNonExistingCollection_GenericDataModel [FAIL]
[xUnit.net 01:00:13.04]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.NotEqual_with_null_reference_type [FAIL]
[xUnit.net 01:00:13.04]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.And_within_Or [FAIL]
[xUnit.net 01:00:13.04]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Not_over_bool_And_Comparison [FAIL]
[xUnit.net 01:00:13.04]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Bool_And_Bool [FAIL]
[xUnit.net 01:00:13.04]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.GreaterThan_with_int [FAIL]
[xUnit.net 01:00:13.04]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.NotEqual_with_null_captured [FAIL]
[xUnit.net 01:00:13.04]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Not_over_NotEqual [FAIL]
[xUnit.net 01:00:13.05]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Equal_with_string [FAIL]
[xUnit.net 01:00:13.05]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Legacy_And [FAIL]
[xUnit.net 01:00:13.05]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Equal_reversed [FAIL]
[xUnit.net 01:00:13.05]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.NotEqual_with_int [FAIL]
[xUnit.net 01:00:13.05]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.NotEqual_reversed [FAIL]
[xUnit.net 01:00:13.05]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Legacy_equality [FAIL]
[xUnit.net 01:00:13.05]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Bool [FAIL]
[xUnit.net 01:00:13.05]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Equal_with_int [FAIL]
[xUnit.net 01:00:13.05]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Contains_over_inline_string_array_with_weird_chars [FAIL]
[xUnit.net 01:00:13.05]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Or [FAIL]
[xUnit.net 01:00:13.05]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Bool_Or_Not_Bool [FAIL]
[xUnit.net 01:00:13.05]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Not_over_Contains [FAIL]
[xUnit.net 01:00:13.06]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Equal_with_null_reference_type [FAIL]
[xUnit.net 01:00:13.06]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Not_over_And [FAIL]
[xUnit.net 01:00:13.06]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Contains_over_inline_int_array [FAIL]
[xUnit.net 01:00:13.06]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.Or_within_And [FAIL]
[xUnit.net 01:00:13.07]     MongoDBIntegrationTests.Filter.MongoDBBasicFilterTests.LessThan_with_int [FAIL]