Experimental: Add ARM64 support when targeting .NET Framework

[David-Engel]

The CI pipelines don't run tests on ARM64 + .NET Framework and I'm having a hard time getting an ARM64 Windows VM to build + run MDS tests from the command line with VS 2022 Preview 6 installed.

Test can be run through the VS GUI, though, you just have to manually filter through expected failures. Doing that identified a bug in the build options of the ARM SNI binaries that resulted in asserts popping up even when using the release binaries. That will be addressed separately in a future SNI release.

Consider this "feature" experimental, for now.

[codecov]

Codecov Report

Base: 71.47% // Head: 71.22% // Decreases project coverage by -0.24% ⚠️

Coverage data is based on head (50d6e76) compared to base (760510c).
Patch coverage: 35.74% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1828      +/-   ##
==========================================
- Coverage   71.47%   71.22%   -0.25%     
==========================================
  Files         291      291              
  Lines       61304    61391      +87     
==========================================
- Hits        43814    43725      -89     
- Misses      17490    17666     +176     

Flag	Coverage Δ
addons	92.38% <ø> (ø)
netcore	74.95% <ø> (-0.09%)	⬇️
netfx	69.08% <35.74%> (-0.32%)	⬇️

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

Impacted Files	Coverage Δ
...SqlClient/src/Microsoft/Data/Common/AdapterUtil.cs	68.24% <0.00%> (-0.15%)	⬇️
...c/Microsoft/Data/Interop/SNINativeMethodWrapper.cs	57.14% <35.92%> (-23.37%)	⬇️
...re/src/Microsoft/Data/SqlClient/SNI/SNINpHandle.cs	73.77% <0.00%> (-4.92%)	⬇️
.../src/Microsoft/Data/SqlClient/SNI/SNIMarsHandle.cs	87.89% <0.00%> (-4.49%)	⬇️
...nt/src/Microsoft/Data/ProviderBase/TimeoutTimer.cs	78.57% <0.00%> (-3.58%)	⬇️
...Microsoft/Data/ProviderBase/DbConnectionFactory.cs	17.04% <0.00%> (-3.41%)	⬇️
...crosoft/Data/ProviderBase/DbReferenceCollection.cs	92.63% <0.00%> (-3.16%)	⬇️
.../Microsoft/Data/SqlClient/SNI/SNIMarsConnection.cs	76.72% <0.00%> (-0.63%)	⬇️
...crosoft/Data/SqlClient/SqlInternalConnectionTds.cs	67.36% <0.00%> (-0.44%)	⬇️
...t/netfx/src/Microsoft/Data/SqlClient/SqlCommand.cs	73.16% <0.00%> (-0.39%)	⬇️
... and 7 more

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[Matteo-T]

Hi @David-Engel / @JRahnama

Nice! When can I expect this to show up in MDS3.x? Pretty please... :)

It would HELP our users on Visual Studio 2022 and SSDT (17.5 Previews) which is on MDS3.1.1 a lot. We can chat offline and bounce around ideas with other folks who are working on this (I'm just the messenger for now).