feat(misconf): Update AppService schema

[yagreut]

Update AppService schema to support new checks

Checklist

• I've read the guidelines for contributing to this repository.
• I've followed the conventions in the PR title.
• I've added tests that prove my fix is effective or that my feature works.
• I've updated the documentation with the relevant information (if needed).
• I've added usage information (if the PR introduces new options)
• I've included a "before" and "after" example to the description (if the PR is a user interface change).

[github-actions]

📊 API Changes Detected

Semver impact: major

github.com/aquasecurity/trivy/pkg/iac/scanners/azure
  Compatible changes:
  - Value.GetMetadata: added

github.com/aquasecurity/trivy/pkg/iac/providers/azure/appservice
  Incompatible changes:
  - Service.Authentication: changed from struct{Enabled github.com/aquasecurity/trivy/pkg/iac/types.BoolValue} to Authentication
  - Service.Identity: changed from struct{Type github.com/aquasecurity/trivy/pkg/iac/types.StringValue} to Identity
  - Service.Site: changed from struct{EnableHTTP2 github.com/aquasecurity/trivy/pkg/iac/types.BoolValue; MinimumTLSVersion github.com/aquasecurity/trivy/pkg/iac/types.StringValue} to Site
  Compatible changes:
  - Authentication: added
  - Identity: added
  - Service.HTTPSOnly: added
  - Site: added