* [tests] Create a libtest.xcframework and libtest2.xcframework
* [tests] Make bindings-test and bindings-test2 use an xcframework instead of plain static library
* [msbuild] Add support for xcframeworks with static libraries in them.
* List the frameworks libtest needs.
* [tests] Update .NET unit tests according to test project changes.
* [tests] Add new test to verify that packing an old-style binding project doesn't work.