Statically linking `libSystem.Globalization.Native` and `libSystem.IO.Compression.Native`/`clrcompression` and use overrider mechanism to invoke.

- Added support for PInvoke overriding mechanism.  A static host or embedder can provide a callback to participate in PInvoke resolution,
- At the time of PInvoke resolution, if there is an override it gets a chance to provide an implementation before normal PInvoke resolution process.
- `libSystem.Globalization.Native` no longer relies on "QCall" mechanism.
Instead there is a default/built-in override, which runs right after the host-provided one. Host-provided override has preference since it runs first.
- The default overrider can be extended if we add more cases where PInvokes are backed by implementations statically linked into runtime (regardless of single-file or .dll/.so scenarios)
- The signature of the overrider callback is:
```c
const void* (PInvokeOverrideFn)(const char* libraryName, const char* entrypointName);
```
Returning `NULL` is interpreted as "no-match" case.
- The overrider is passed to `coreclr_initialize` as a property named `PINVOKE_OVERRIDE`. The value is a pointer encoded as a hex-based string value. This is similar to `BUNDLE_PROBE`.
- The implementation of an override is up to the overrider.
In this change the following scheme was used:
-- Host overrider dispatches on the name of the library (text match) and defers to one of the embedded libraries, if there is a match.
-- The library dispatches on the _native_ name of the Dll Import and provides a method pointer of there is a match.