scripts: Update and lock ruff

The ruff linter and formatter should get a locked version to be installed
for compliance. This prevents new linter issues because of ruff updates
itself.

Ruff version 0.8.0 removed the deprecated UP027 rule so it's removed from
the ignore list.

Update the excludes file to match the actual reported issues.

Signed-off-by: Pieter De Gendt <pieter.degendt@basalte.be>