[release/7.0-rc1] Omit the JS sync context if threads are not enabled#74236

carlossanlop merged 2 commits intorelease/7.0-rc1dotnet/runtime:release/7.0-rc1from

backport/pr-74167-to-release/7.0-rc1dotnet/runtime:backport/pr-74167-to-release/7.0-rc1Copy head branch name to clipboard