[Blocked] Remove SuppressMessage for CA1062 violations for extension methods

[scowalt]

Suppressing this warning should be covered by the .editorconfig configuration I added. Unfortunately, the .editorconfig configuration is broken. So, we need to manually suppress each instance until that bug is fixed.

Configuration info: https://docs.microsoft.com/en-us/visualstudio/code-quality/ca1062?view=vs-2019#configurability Blocking bug: https://github.com/dotnet/roslyn-analyzers/issues/3451