Add touch release detection to draggable parts of BoundingBoxGizmo

[Hsifnus]

As a followup from this thread on the BabylonJS forums, this PR adds touch release detection to the draggable components (scale boxes, rotation spheres) of the BoundingBoxGizmo such that those parts will now unhighlight correctly when releasing touch while dragging said parts.

[bjsplat]

Please make sure to label your PR with "bug", "new feature" or "breaking change" label(s).
To prevent this PR from going to the changelog marked it with the "skip changelog" label.

[bjsplat]

Snapshot stored with reference name:
refs/pull/13428/merge

Test environment:
https://babylonsnapshots.z22.web.core.windows.net/refs/pull/13428/merge/index.html

To test a playground add it to the URL, for example:

https://babylonsnapshots.z22.web.core.windows.net/refs/pull/13428/merge/index.html#WGZLGJ#4600

Links to test babylon tools with this snapshot:

https://playground.babylonjs.com/?snapshot=refs/pull/13428/merge
https://sandbox.babylonjs.com/?snapshot=refs/pull/13428/merge
https://gui.babylonjs.com/?snapshot=refs/pull/13428/merge
https://nme.babylonjs.com/?snapshot=refs/pull/13428/merge

To test the snapshot in the playground with a playground ID add it after the snapshot query string:

https://playground.babylonjs.com/?snapshot=refs/pull/13428/merge#BCU1XR#0