Add BeforeAll/AfterAll scripts for centralized test resource cleanup

[Copilot]

Tests were accumulating orphaned resources (repos, teams, secrets) from failed runs, causing rate limiting and conflicts. Each test context repeatedly created/destroyed resources independently, multiplying API calls across parallel execution.

Changes

New Scripts

• tests/BeforeAll.ps1 - Pre-test cleanup of stale resources across all 7 auth scenarios
• tests/AfterAll.ps1 - Post-test safety net for missed cleanup
• tests/README-SETUP-TEARDOWN.md - Implementation documentation

Resource Cleanup Pattern

# Before: Each of 15 test files × 7 auth scenarios creates/destroys resources
# Now: Cleanup runs once before/after all parallel test jobs

foreach ($authCase in $authCases) {
    Connect-GitHubAccount @authCase.ConnectParams
    
    # Remove orphaned test resources by prefix
    Get-GitHubRepository | Where-Object { $_.Name -like "$testPrefix*" } | 
        Remove-GitHubRepository -Confirm:$false
        
    # Similar for teams, secrets, variables, app installations
}

Benefits

• Significantly fewer API calls → reduced rate limiting
• Clean slate per test run → eliminates resource conflicts
• Safety net → catches missed test cleanup
• Zero test file changes → fully backward compatible

Coverage
Cleans up resources for all test prefixes: RepositoriesTests, TeamsTests, EnvironmentsTests, SecretsTests, VariablesTests, AppsTests, ArtifactsTests, ReleasesTests, PermissionsTests, MsxOrgTests, GitHubTests

Process-PSModule v5 automatically detects and executes these scripts before/after the test matrix.

Original prompt

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This section details on the original issue you should resolve

<issue_title>🩹 [Patch]: Consolidate test setup/teardown tasks</issue_title>
<issue_description>### Describe the change

Now that Process-PSModule supports BeforeAll and AfterAll scripts, that run once before and after all the parallel tests, we should move some of the setup/teardown tasks to these. This will hopefully speed up the testing process, and result in fewer failures due to ratelimiting.

Current Test Structure

Each test file currently performs repeated setup/teardown in individual Context blocks:

• Creates unique test resources (repos, teams, orgs) per Context
• Connects/disconnects GitHub accounts multiple times
• Cleans up resources after each Context

Proposed Changes

tests/BeforeAll.ps1 - Infrastructure Setup

Create shared test infrastructure that ALL tests can use:

• Test Organizations - Pre-create test organizations for different auth scenarios
• Test Repositories - Pre-create base repositories for testing
• Test Environments - Pre-create deployment environments
• Test Teams - Pre-create teams with different permission levels
• Cleanup old artifacts - Remove stale resources from previous failed runs

Important: This does NOT replace the BeforeAll blocks in test files, which are still needed for:

• Authentication (Connect-GitHubAccount, Connect-GitHubApp)
• Context-specific setup
• Loading test data (AuthCases.ps1)

tests/AfterAll.ps1 - Infrastructure Teardown

Clean up all shared test infrastructure:

• Remove all test organizations created in BeforeAll
• Remove all test repositories
• Remove all test teams and environments
• Generate cleanup report

Test Files - Keep Existing BeforeAll/AfterAll Blocks

Test file Context blocks should continue to:

• BeforeAll: Connect to GitHub with appropriate credentials (this stages the runner)
• AfterAll: Disconnect GitHub sessions
• Use the pre-created infrastructure instead of creating their own

Benefits

1. Speed: Infrastructure created once instead of repeatedly per Context
2. Rate Limiting: Significantly fewer API calls during test execution
3. Reliability: Consistent test infrastructure across all test runs
4. Cost: Fewer parallel operations hitting API limits
5. Maintainability: Centralized infrastructure definitions

Implementation Strategy

1. Analyze current test patterns to identify common infrastructure needs
2. Create tests/BeforeAll.ps1 with infrastructure provisioning
3. Create tests/AfterAll.ps1 with cleanup logic
4. Update test files to consume shared infrastructure instead of creating their own
5. Maintain existing authentication logic in test file BeforeAll/AfterAll blocks

Test Files Affected

All 15 test files will need updates to use shared infrastructure:

• Apps.Tests.ps1
• Artifacts.Tests.ps1
• Emojis.Tests.ps1
• Enterprise.Tests.ps1
• Environments.Tests.ps1
• GitHub.Tests.ps1
• GitHubFormatter.Tests.ps1
• Organizations.Tests.ps1
• Permissions.Tests.ps1
• Releases.Tests.ps1
• Repositories.Tests.ps1
• Secrets.Tests.ps1
• Teams.Tests.ps1
• Users.Tests.ps1
• Variables.Tests.ps1</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes 🩹 [Patch]: Consolidate test setup/teardown tasks #534

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