Fix gem.py, hang on uninstall specific gem version (#5751)
* Update gem.py
move 'cmd.append('--executable')' to all uninstalls rather than only all versions
* Create 5751-gem-fix-uninstall-hang
* Rename 5751-gem-fix-uninstall-hang to 5751-gem-fix-uninstall-hang.yml
(cherry picked from commit 2670215c8a)
Co-authored-by: rietvelde <99407273+rietvelde@users.noreply.github.com>