Reduced set: Safe-deployment enhancements

[kjohn-msft]

• Fixes a bug in extension handler where healthstoreId wasn't being passed to Core
• Service-originating CloudType support was added explicitly
• Derivation of max patch publish date from healthstoreId added to core
• Removed transitional dependency on maintenanceRunId and moved over fully to healthstoreId - fixed tests to align
• Apt package manager enhanced to benefit from repo snapshots.
• Patch installer enhanced to use a simplified execution model for strict SDP where flexibilty exists.
• StatusHandler enhanced to show single informational messages if only that message exists with no actual errors. (LT request)

This is a partial slice of a much larger change-set that will be reviewed separately due to complexity.

[codecov]

Codecov Report

Merging #223 (2babf8e) into master (b50ef62) will increase coverage by 0.04%.
The diff coverage is 98.33%.

@@            Coverage Diff             @@
##           master     #223      +/-   ##
==========================================
+ Coverage   90.39%   90.43%   +0.04%     
==========================================
  Files          90       90              
  Lines       14810    14987     +177     
==========================================
+ Hits        13387    13554     +167     
- Misses       1423     1433      +10     

Flag	Coverage Δ
python27	90.43% <98.33%> (+0.04%)	⬆️
python39	90.43% <98.33%> (+0.04%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
src/core/src/bootstrap/Constants.py	98.67% <100.00%> (+0.01%)	⬆️
src/core/src/core_logic/ExecutionConfig.py	85.13% <100.00%> (+0.96%)	⬆️
src/core/src/core_logic/PatchInstaller.py	98.61% <100.00%> (+1.94%)	⬆️
...ore/src/package_managers/AptitudePackageManager.py	90.44% <100.00%> (+0.79%)	⬆️
src/core/src/service_interfaces/StatusHandler.py	95.30% <100.00%> (+0.49%)	⬆️
src/core/tests/Test_ConfigurePatchingProcessor.py	99.04% <100.00%> (+<0.01%)	⬆️
src/core/tests/Test_CoreMain.py	99.88% <100.00%> (+<0.01%)	⬆️
src/core/tests/Test_PatchInstaller.py	99.46% <100.00%> (-0.35%)	⬇️
src/core/tests/library/LegacyEnvLayerExtensions.py	94.80% <100.00%> (ø)
src/core/tests/library/RuntimeCompositor.py	100.00% <100.00%> (ø)
... and 8 more

... and 6 files with indirect coverage changes