[PSRule] Fix Rule Azure.Policy.AssignmentDescriptors

[fabmas]

Rule Azure.Policy.AssignmentDescriptors

Error: AZR-000143: ***apasubmin001 failed Azure.Policy.AssignmentDescriptors. Policy assignments should use a display name and description.

:question: Validate with the team if the following actions are good:

1. Set "description" and "displayName" as mandatory parameters in the deploy.bicep file.
2. Add the following parameters on the deploy.test.bicep:

   description: '[Description] Policy Assignment at the management group scope'   
   displayName: '[Display Name] Policy Assignment at the management group scope'

   Above actions should be applied to the following files:

• ResourceModules/modules/Microsoft.Authorization/policyAssignments/.test/sub.min/deploy.test.bicep 
• ResourceModules/modules/Microsoft.Authorization/policyAssignments/.test/rg.min/deploy.test.bicep 
• ResourceModules/modules/Microsoft.Authorization/policyAssignments/.test/mg.min/deploy.test.bicep 
• ResourceModules/modules/Microsoft.Authorization/policyAssignments/deploy.bicep 

[eriqua]

OPT 1: Configure the Rule to be ignored for files (i.e., exclusion) OPT 2: Make the property mandatory and update the test cases to comply

Team decides for OPT1