Use find_package for fcl (backport #2399)

[mergify]

This is an automatic backport of pull request #2399 done by Mergify.
Cherry-pick of 498a9f3 has failed:

On branch mergify/bp/humble/pr-2399
Your branch is up to date with 'origin/humble'.

You are currently cherry-picking commit 498a9f3d6.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   moveit_core/collision_detection_fcl/CMakeLists.txt

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   moveit_core/CMakeLists.txt

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

---

Mergify commands and options

More conditions and actions can be found in the documentation.

You can also trigger Mergify actions by commenting on this pull request:

• @Mergifyio refresh will re-evaluate the rules
• @Mergifyio rebase will rebase this PR on its base branch
• @Mergifyio update will merge the base branch into this PR
• @Mergifyio backport <destination> will backport this PR on <destination> branch

Additionally, on Mergify dashboard you can:

• look at your merge queues
• generate the Mergify configuration with the config editor.

Finally, you can contact us on https://mergify.com

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (5dd0d5e) 50.95% compared to head (4d72c54) 50.95%.

Additional details and impacted files

@@           Coverage Diff           @@
##           humble    #2400   +/-   ##
=======================================
  Coverage   50.95%   50.95%           
=======================================
  Files         382      382           
  Lines       31889    31889           
=======================================
  Hits        16246    16246           
  Misses      15643    15643           

see 3 files with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.