[release/6.0-rc1] JIT: don't clone loops where init or limit is a cast local#57690

jeffschwMSFT merged 2 commits intorelease/6.0-rc1dotnet/runtime:release/6.0-rc1from

backport/pr-57602-to-release/6.0-rc1dotnet/runtime:backport/pr-57602-to-release/6.0-rc1Copy head branch name to clipboard