fix: Upgrade Wix to v5 to fix an issue with non-elevated installs.

[jaffinito]

Description

Upgrades our Wixtoolset version for v3 to v5 to resolve a problem in that version with non-elevated installs.

As part of this change:

• Used HeatWave, a community tool for wix migrations (and authoring) to migrate away from v3.
• Migrated the MsiInstaller project files (Installer and InstallerActions) to SDK-style files
• Updated the InstallerActions project to net481.
• Wix v5 relies on nuget packages for building and not on a local install of Wix - which does not exist in v5.

Updates dependabot to check the MSI nugets.

Author Checklist

• Unit tests, Integration tests, and Unbounded tests completed
• Performance testing completed with satisfactory results (if required)

Reviewer Checklist

• Perform code review
• Pull request was adequately tested (new/existing tests, performance tests)

[chynesNR]

Changes look reasonable to me. Do we still have testing to do or do you think we're in good shape?

[chynesNR]

@nrcventura had a good point -- we should make sure Dependabot is scanning the installer directory to catch new versions of WiX, since it's only a NuGet package now. I'm not positive it'll scan .wixproj files though.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.59%. Comparing base (973492b) to head (f079df8).
Report is 163 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2471      +/-   ##
==========================================
+ Coverage   80.43%   80.59%   +0.15%     
==========================================
  Files         450      459       +9     
  Lines       27945    28777     +832     
  Branches     3023     3184     +161     
==========================================
+ Hits        22478    23193     +715     
- Misses       4691     4800     +109     
- Partials      776      784       +8     

Flag	Coverage Δ
Agent	81.54% <ø> (+0.13%)	⬆️
Profiler	72.15% <ø> (+0.21%)	⬆️

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see 46 files with indirect coverage changes