Add integration test for Get-SqlDscDatabasePermission command

[Copilot]

Creating integration test for Get-SqlDscDatabasePermission command

• Explore repository structure and existing integration tests
• Analyze Get-SqlDscDatabasePermission command functionality
• Study integration test patterns from similar commands (Get-SqlDscServerPermission)
• Identify integration test group placement (Group 2 in azure-pipelines.yml)
• Review dependencies and test environment requirements
• Create integration test file following established patterns
• Add test to azure-pipelines.yml in correct group
• Validate test runs successfully (syntax check passed)
• Update documentation (README.md and CHANGELOG.md)
• Address PR feedback: removed service management and corrected error message

The integration test for Get-SqlDscDatabasePermission has been successfully created and refined based on reviewer feedback. Recent changes:

• Removed service management: No longer starts/stops MSSQL$DSCSQLTEST service as it's managed elsewhere
• Fixed error message: Updated to reference 'Tasks noop' instead of 'Tasks build'
• File formatting: Ensured file ends with exactly one blank line per guidelines

The test comprehensively validates database permission retrieval functionality including error handling, property validation, and pipeline support while following all established integration test patterns.

Fixes #2221.

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This change is 

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94%. Comparing base (52e707f) to head (9400a7b).
⚠️ Report is 55 commits behind head on main.

Additional details and impacted files

@@         Coverage Diff          @@
##           main   #2253   +/-   ##
====================================
  Coverage    94%     94%           
====================================
  Files       149     149           
  Lines      9163    9174   +11     
====================================
+ Hits       8687    8698   +11     
  Misses      476     476           

Flag	Coverage Δ
unit	94% <100%> (+<1%)	⬆️

Files with missing lines	Coverage Δ
source/Public/Get-SqlDscDatabasePermission.ps1	100% <100%> (ø)
source/Public/Test-SqlDscIsDatabasePrincipal.ps1	100% <100%> (ø)

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[johlju]

@johlju reviewed 3 of 4 files at r4, 2 of 2 files at r5, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @copilot)

[johlju]

@johlju reviewed 9 of 9 files at r6, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @copilot)