Add PGO GENPROFILE support to coreclr and clrjit (dotnet/coreclr#7423)

Add PGO GENPROFILE support to coreclr and clrjit (dotnet/coreclr#7423)

* Add PGO GENPROFILE support to coreclr and clrjit

Update the cmake build system to enable support for Profile Guided
Optimization (PGO) on Windows, and enable this feature for two target
binaries (coreclr and clrjit).

With this change, toggle between instrumented and profile-optimized
settings for target binaries by passing pgoinstrument argument to the build.cmd
Assume profile-optimized mode by default. Fall back to regular non-PGO
optimized builds if profile data is not available.

Commit migrated from https://github.com/dotnet/coreclr/commit/114b58869def96c720d0c2fd9b77ceccdc924b96