GitLab

This CL just renames `omt-worker-fetch` directory to
`plz-dedicated-worker`. There is no change in tests themselves.

Bug: 906991
Change-Id: I83794034f6fe163482b3b55d7c040d6a0464450b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2537251
Commit-Queue: Matt Falkenhagen <falken@chromium.org>
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#827768}