To ensure Android exports are compatible with the new Play Store
requirement that all `.so` libraries included are aligned to 16k,
we now require C# projects to target `net9.0` which uses the
correct alignment (as opposed to the current one of 4k).
The thirdparty jar library has also been updated to the one from
the 9.0.4 runtime package so it's compatible with non-gradle
builds targeting `net9.0`.
Non-android projects are not affect, the minimum TFM is still
`net8.0`.
Include the needed .NET jar in the Godot templates so it's always available, then we don't need to include the jar from a .NET publish which could fail when exporting to multiple architectures because it would attempt to add the same jar for each architecture.
Some platforms don't support hostfxr but we can use the coreclr/monosgen library directly to initialize the runtime.
Android exports now use the `android` runtime identifier instead of `linux-bionic`, this removes the restrictions we previously had:
- Adds support for all Android architectures (arm32, arm64, x32, and x64), previously only the 64-bit architectures were supported.
- Loads `System.Security.Cryptography.Native.Android` (the .NET library that binds to the Android OS crypto functions).
