Fix patch installer after ManagedVwWindow removal

[johnml1135]

Summary

• Adds ManagedVwWindow.dll, ManagedVwWindow.dll.config, and ManagedVwWindow.pdb to the existing RescuePatching placeholders.
• Keeps the retired Linux-era shim removed while preserving the legacy patch installer component graph for the current base build.
• Fixes the post-merge Patch Installer failure from https://github.com/sillsdev/FieldWorks/actions/runs/26286364180, where Pyro reported PYRO0305 because those base components disappeared from the update harvest.

Verification

• Confirmed the failing CI log reported PYRO0305 for the three ManagedVwWindow components in PatchableInstaller/CreateUpdatePatch/Master/AppHarvest.wxs.
• Ran the focused placeholder check for all three files.
• Ran MSBuild target Setup;RescuePatching and verified all three placeholders were created as zero-byte files under Output\Release.
• Ran Build\Agent\Remove-StaleDlls.ps1 -OutputDir "Output\Release" -RepoRoot "." -ReferenceDir "Output\Release" -ValidateOnly and it accepted the placeholders.
• Ran CI: Commit messages locally; no gitlint errors were reported.

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This change is 

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Fixes the Patch Installer’s update-harvest failure after ManagedVwWindow removal by restoring expected base-component placeholders during RescuePatching.

Changes:

• Adds ManagedVwWindow.dll placeholder to RescuePatching removed-since-base list
• Adds ManagedVwWindow.dll.config placeholder to RescuePatching removed-since-base list
• Adds ManagedVwWindow.pdb placeholder to RescuePatching removed-since-base list

[github-actions]

NUnit Tests

    1 files  ±0      1 suites  ±0   11m 0s ⏱️ -11s
4 203 tests ±0  4 132 ✅ ±0  71 💤 ±0  0 ❌ ±0 
4 212 runs  ±0  4 141 ✅ ±0  71 💤 ±0  0 ❌ ±0 

Results for commit 4216ecd. ± Comparison against base commit 8e99077.

[jasonleenaylor]

@jasonleenaylor reviewed 1 file and made 1 comment.
Reviewable status: all files reviewed (commit messages unreviewed), all discussions resolved (waiting on johnml1135).