Enable FEATURE_METADATA_EMIT_ALL for non-crossgen compiles

Enable FEATURE_METADATA_EMIT_ALL for non-crossgen compiles

This allows ilasm roundtrip test to work with NetStandard 2.0
changes where C# compiler emits a ".permissionset" attribute
into the assembly that ildasm emits. This define enables the
APIs that ilasm uses to process this attribute.

Re-enable ilasm roundtrip test.

Fixes dotnet/coreclr#8418

Commit migrated from https://github.com/dotnet/coreclr/commit/e4849aae67375a2dfbe73bf2bf94e4abc17464d4