Add check for vulkan support in rendering

[iche033]

🦟 Bug fix

Fixes https://github.com/gazebosim/gz-gui/issues/585

Summary

Add check to make sure we only enable vulkan only if gz-rendering is built with vulkan support.

Checklist

• [x] Signed all commits for DCO
• [ ] Added tests
• [ ] Updated documentation (as needed)
• [ ] Updated migration guide (as needed)
• [ ] Consider updating Python bindings (if the library has them)
• [ ] codecheck passed (See contributing)
• [ ] All tests passed (See test coverage)
• [ ] While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[codecov[bot]]

Codecov Report

Merging #589 (98e2f04) into gz-gui8 (872222a) will not change coverage. The diff coverage is n/a.

:exclamation: Current head 98e2f04 differs from pull request most recent head 99a8619. Consider uploading reports for the commit 99a8619 to get more accurate results

@@           Coverage Diff            @@
##           gz-gui8     #589   +/-   ##
========================================
  Coverage    68.09%   68.09%           
========================================
  Files           39       39           
  Lines         5372     5372           
========================================
  Hits          3658     3658           
  Misses        1714     1714           

Files	Coverage Δ
src/plugins/minimal_scene/MinimalScene.cc	57.73% <ø> (ø)