[Humble] Added use_platform_controllers for R100.

[mergify]

Backport of #313 to Humble.

[mergify]

Cherry-pick of 932f706 has failed:

On branch mergify/bp/humble/pr-313
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	both modified:   clearpath_platform_description/urdf/r100/r100.urdf.xacro

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[mergify]

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