Is your feature request related to a problem? Please describe.

VSTHRD103 and CA1849 seem to be duplicates. But CA1849 seems to be better. For example, VSTHRD103 is missing the fix from dotnet/roslyn-analyzers#6858

Describe the solution you'd like

VSTHRD103 should be disabled in SDKs that contain CA1849.

Describe alternatives you've considered

Manually disabling VSTHRD103 in each project, which is annoying.

Additional context

There might be other analyzers which are duplicates. All should be disabled if they already exist in the SDK.