[release/7.0.1xx] Increase dotnet-watch source-build smoke test timeout#14842

MichaelSimons merged 2 commits intodotnet:release/7.0.1xxdotnet/installer:release/7.0.1xxfrom

lbussell:smoke-test-dotnet-watch-timeoutlbussell/installer:smoke-test-dotnet-watch-timeoutCopy head branch name to clipboard