[cfe/ffi] Improve FFI call mismatched types compile errors

This CL fixes two issues.

1. `FfiNative`s now check the Dart and native type for compatiblity.
2. Both `FfiNative`, `asFunction`, and `lookupFunction` check the type
   correspondence between native and Dart type with a subtype check of
   the expected Dart type and the provided Dart type. For functions,
   any return type is a subtype of a void type. This is fine for Dart,
   but not for native calls. This CL manually checks the return type
   for void.

This CL does not fix the inconsistency between `asFunction` and
`FfiNative` with regard to allowing more strict return types than
`Object` for `Handle`s
Issue: https://github.com/dart-lang/sdk/issues/49518

Analyzer fixes in follow up CL.

TEST=tests/ffi/vmspecific_static_checks_ffinative_test.dart

Closes: https://github.com/dart-lang/sdk/issues/49471
Change-Id: Ibc7bd6a1a0db59cc5fa5d755d76999fd7e9a06a4
Cq-Include-Trybots: luci.dart.try:analyzer-linux-release-try,analyzer-mac-release-try,vm-ffi-android-debug-arm-try,vm-ffi-android-debug-arm64c-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/252601
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Daco Harkes <dacoharkes@google.com>