feat(application integration): Add example for creating auth configs

[pay20]

Description

Fixes #

Note: If you are not associated with Google, open an issue for discussion before submitting a pull request.

Checklist

Readiness

• [ *] Yes, merge this PR after it is approved
• No, don't merge this PR after it is approved

Style

• [ *] My sample follows the rules described for Terraform in the Effective Samples style guide
• [* ] My sample follows the other requirements and best practices in the Contributing
  guide

Testing

• [* ] I have performed tests described in the Contributing guide:

  • Tests pass: terraform apply
  • Lint pass: terraform fmt check

Intended location

• Yes, this sample will be (or already is) included on cloud.google.com
  Location(s): https://cloud.google.com/application-integration/docs/configure-authentication-profiles

• No, this sample won't be included on cloud.google.com
  Reason:

API enablement

• If the sample needs an API enabled to pass testing, I have added the service to the Test setup file

Review

• [] If this sample adds a new directory, I have added codeowners to the CODEOWNERS file

[snippet-bot]

Here is the summary of changes.

You are about to add 6 region tags.

• application_integration/create_auth_config/main.tf:19, tag application_integration_create_auth_config_auth_token
• application_integration/create_auth_config/main.tf:39, tag application_integration_create_auth_config_certificate
• application_integration/create_auth_config/main.tf:100, tag application_integration_create_auth_config_jwt
• application_integration/create_auth_config/main.tf:117, tag application_integration_create_auth_config_oauth2_authorization_code
• application_integration/create_auth_config/main.tf:136, tag application_integration_create_auth_config_oauth2_client_credentials
• application_integration/provision_region/main.tf:20, tag application_integration_edit_region

You are about to delete 1 region tag.

• application_integration/main.tf:20, tag application_integration_edit_region

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[glasnt]

/gcbrun

[glasnt]

/gcbrun

[glasnt]

/gcbrun

[glasnt]

/gcbrun

[glasnt]

/gcbrun

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[glasnt]

/gcbrun

[glasnt]

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[glasnt]

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[glasnt]

/gcbrun

[glasnt]

Note: service account and oidc examples have been failing tests, removing them for now as not to block the other samples from landing. This will need to be addressed and readded in a future PR.
/gcbrun