Remove "detached" from Merge Request pipeline details in MR widget

Feature enhancement

Following the changes in #352939 (closed), we also need to remove the detached wording from the MR widget:

Screen_Shot_2022-09-02_at_23.08.19

Proposal

We should change Detached merge request pipeline to simply Merge request pipeline.

Related issues

Related to Frontend: Rename pipeline type labels for `merg... (#352939 - closed)