Improve native AOT compatibility

[MichalStrehovsky]

In the end, someone will need to do the work to enable the AOT/trim/single file safety analyzers and address all the warnings, but this is enough to have a golden path that makes sample/StackTrace project produce the same results under native AOT as under JIT.

Necessary fixes:

• GetMethodBody under AOT throws. This will not return anything useful under Mono with ILStrip either. The code simply needs to deal with it.
• Runtime reflection stack doesn't guarantee referential equality of MemberInfos (except for TypeInfo). This is also true on JIT-based runtimes, but there's even less caching on native AOT. Use operator ==.
• The reflection to read TupleElementNamesAttribute is trim-unfriendly and cannot be analyzed. Replace with no-reflection.
• Some fallout from the previous point because the nullable annotations on the thing returned by reflection were wrong.

[bruno-garcia]

@jamescrosswell work bringing this in too https://github.com/getsentry/Ben.Demystifier/

We're keeping our fork going while Ben isn't available here. Since this is used in https://github.com/getsentry/sentry-dotnet