Add configuration property for GraphQL Schema Mapping Inspection

[hansdesmet]

In Spring GraphQL you can do schema mapping inspection:
https://docs.spring.io/spring-graphql/docs/current/reference/html/#execution.graphqlsource.schema-mapping-inspection

I have to write some Java code myself to enable this:

GraphQlSource.Builder builder = ...

builder.schemaResources(..)
        .inspectSchemaMappings(report -> {
            logger.debug(report);
        })

Could you add a setting to application.properties which does this for me, for example:
spring.graphql.schema.mapping.inspection=debug
In this setting debug refers to logger.debug(.
It coud also be none (default), info, error.

[bclozel]

To better align with other properties, we went with the following arrangement:

• a new spring.graphql.schema.inspection.enabled configuration property
• this property is enabled by default
• the report is logged at the INFO level