Remove suppression of VSIXCompatibility1001

`eng\config\globalconfigs\Common.globalconfig`:

```
# Workaround for old Microsoft.VisualStudio.Progression.* packages: https://github.com/dotnet/roslyn/issues/71404
dotnet_diagnostic.VSIXCompatibility1001.severity = none
```
Depends on https://devdiv.visualstudio.com/DevDiv/_git/VS/pullrequest/516234