Fix rqt controller manager (backport #1273)

[mergify]

This is an automatic backport of pull request #1273 done by Mergify.
Cherry-pick of 2d82de8 has failed:

On branch mergify/bp/humble/pr-1273
Your branch is up to date with 'origin/humble'.

You are currently cherry-picking commit 2d82de8.
  (fix conflicts and run "git cherry-pick --continue")
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Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   controller_manager/controller_manager/controller_manager_services.py
	both modified:   rqt_controller_manager/rqt_controller_manager/controller_manager.py

no changes added to commit (use "git add" and/or "git commit -a")

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[christophfroehlich]

@saikishor could you please have a look why this fails for humble?

[saikishor]

@saikishor could you please have a look why this fails for humble?

@christophfroehlich It seems to be due to the conflicts. Shall I open a separate PR for the Humble? That would be easier I guess

[christophfroehlich]

you can open a new PR against humble or a PR against mergify/bp/humble/pr-1273, whatever you prefer.