Upgrade MSAN bots from Focal to Jammy

The instrumented_libraries have been upgraded from Focal, so we no
longer need to request Focal swarming bots for MSAN.

Bug: 40255350
Change-Id: I06d045d1f358ebab1d217a2f0092c59da9166f76
Cq-Include-Trybots: luci.chromium.try:linux_chromium_chromeos_msan_rel_ng,linux_chromium_msan_rel_ng
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5618114


Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Reviewed-by: Garrett Beaty <gbeaty@google.com>
Cr-Commit-Position: refs/heads/main@{#1313140f}