Fix: Add outputs to Application Insights module, optional Entra ID group memberships for App Services

[patrickmoore-nc]

Description

1. Adds name and resource_group_name outputs to Application Insights module.
2. Adds optional Entra ID group memberships for App Services (Function App, Web App).

Neither of these changes is impactful to existing code with module dependencies.

Context

1. Will allow direct resource references between App Services in tf-core Terraform state, and Application Insights intf-audit Terraform state. Allows the removal of some parameterisation from tfvars for stronger coupling.
2. Will allow replacement of individual RBAC roles per App Service with RBAC roles assigned via group memberships. Will greatly reduce Terraform deployment times for Cohort Manager (many Function Apps), but will need admin rights over an Organization Unit within Entra ID which is a request pending with CCOE team.

Testing:

• Successfully deployed to Participant Manager Dev (Audit):
  https://dev.azure.com/nhse-dtos/dtos-participant-manager/_build/results?buildId=17666&view=results
• Successfully deployed to Participant Manager Dev (Core):
  https://dev.azure.com/nhse-dtos/dtos-participant-manager/_build/results?buildId=17670&view=results

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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