Ruff: reformat agents.

Preserve yapf style to the best capacity.

LSC doc:
https://docs.google.com/document/d/1P6AE9aeKuFkxPAYInYxLFIpDgpiCAT-S_BQkNU0lb3s/edit?tab=t.0

Onboarded using the following command: `~/cr/depot_tools/ruff_chromium format .`

Bug: 40874143
Change-Id: If6f55f9e4d9cd991482b4c104bb62af66a6a6964
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/8255229
Owners-Override: Alex Ovsienko <ovsienko@google.com>
Commit-Queue: Alex Ovsienko <ovsienko@google.com>
Reviewed-by: Junji Watanabe <jwata@google.com>
Cr-Commit-Position: refs/heads/main@{#1678648}
NOKEYCHECK=True
GitOrigin-RevId: 863ecd16135a256b072c38e9bcc90d744deeb40c