Use https git URL for cloning srdf repo

[marc-wittwer]

Description

If git is not setup with ssh the cloning step will fail.

vcs import < moveit2_tutorials/moveit2_tutorials.repos

I was following this moveit2 tutorial:
https://moveit.picknik.ai/main/doc/tutorials/getting_started/getting_started.html#create-a-colcon-workspace-and-download-tutorials

Checklist

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[gavanderhoorn]

Would be nicer to spec https URLs everywhere.

Users who'd prefer to checkout over SSH could just add:

[url "ssh://git@github.com/"]
	insteadOf = https://github.com/

to their $HOME/.gitconfig.