[PSRule] Fix Rule Azure.Policy.AssignmentDescriptors #2668

[elanzel]

Description

Configured min-suppress.Rule-yaml to exclude evaluation of rule Azure.Policy.AssignmentDescriptors for min 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

closes #2668

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Type of Change

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• Bugfix (non-breaking change which fixes an issue)

Checklist

• I'm sure there are no other open Pull Requests for the same update/change
• My corresponding pipelines / checks run clean and green without any errors or warnings
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (readme)
• I did format my code