Blender Git Loki

UI: Display indicator in the 3D Viewport when Clipping Region is on

Small addition inspired by [this tweet](https://twitter.com/Vorundor/status/1390645286624763909) of a user in a situation I also saw myself in the past.

Showing "(Clipped)" next to the view name in the `Text Info` overlay fits well since it's a per-viewport setting.

{F10059921, size=full}

While on Local view:
{F10059925, size=full}

Multiple viewports:
{F10059946, size=full}

Reviewed By: Severin

Differential Revision: https://developer.blender.org/D11193