Build-test.sh handles native test assets (dotnet/coreclr#19430)

Build-test.sh handles native test assets (dotnet/coreclr#19430)

* Respect Windows script argument to skip package building.

* Bring build.sh logic closer to build.cmd with respect to passing CMAKE flags for building tests

* Make cmake gen script find override file without using script arguments

* build-test.sh can now build native test projects
Remove compileoptions.cmake and push contents into configurecompiler.cmake
 which contains compiler configuration from repo root CMakeLists.txt

Commit migrated from https://github.com/dotnet/coreclr/commit/f0f42d4c0fc3cfd782b89171840e2590604392cd