[DTOSS-12018] - Add support for excluding paths from Entra ID authentication

[josielsouzanordcloud]

Description

This PR adds the ability to configure specific paths that bypass Entra ID authentication on container apps. This provides flexibility for endpoints that need to remain publicly accessible while the rest of the application remains secured.

Changes:

• Added auth_excluded_paths variable to the container-app module to allow configuring paths that don't require authentication
• Integrated excludedPaths parameter in the Azure Container App authentication configuration
• Updated module documentation with usage examples and guidance
• Default value allows common use cases like health checks and version endpoints

Context

Some endpoints need to be accessible without authentication when the EasyAuth is enabled for operational reasons:

• Health monitoring by orchestration platforms
• Availability checks by monitoring systems
• Public status or version information endpoints
• Integration with external systems that don't support authentication

This change provides a configurable, secure way to handle these scenarios without compromising the authentication requirements for the rest of the application.

Type of changes

• Refactoring (non-breaking change)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would change existing functionality)
• Bug fix (non-breaking change which fixes an issue)

Checklist

• I am familiar with the contributing guidelines
• I have followed the code style of the project
• I have added tests to cover my changes
• I have updated the documentation accordingly
• This PR is a result of pair or mob programming

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• I confirm that neither PII/PID nor sensitive data are included in this PR and the codebase changes.