🧪 Add Pester test assertion for Clear-RecycleBin

[murilogiatti]

🎯 What: Added a missing test assertion for the Clear-RecycleBin invocation in the test suite for CleanupAndUpdateEverything.ps1.
📊 Coverage: The "Should run successfully in SilentMode" test scenario is now verifying that Clear-RecycleBin -Force is being correctly invoked during execution. Also correctly updated test mocks and stub functions across the board to ensure parameter checks succeed and to remove test pollution from system paths.
✨ Result: Test coverage is now complete for step 1 of the cleanup process, guaranteeing that recycle bin cleaning won't regress without being caught by tests.

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PR created automatically by Jules for task 8949062033001928497 started by @murilogiatti

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