[release/7.0] Don't try to build PGO tools on platforms with no CoreCLR port.#75003

akoeplinger merged 3 commits intorelease/7.0dotnet/runtime:release/7.0from

backport/pr-74147-to-release/7.0dotnet/runtime:backport/pr-74147-to-release/7.0Copy head branch name to clipboard