Enable more code analysis rules for code analyzers

Currently `AnalysisMode` is not explicitly set for code analyzer projects and therefore has `Default` mode. I would suggest to enable more rules by setting it explicitly.

It would probably be easier to start doing this in separate projects setting `AnalysisMode` to `Minimum` first and then gradually increasing to the desired level. Then it could be set in `Directory.Build.props` when all projects are ready.

This should particularly improve performance as there are quite a few performance-related analyzers, I think code analysis performance is really important as it directly affects build times. For example, it should help catch [CA1860](https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1860) errors, I'm fixing one of them in #50310.