[infra] Add Debian11 CPU test job

Bug: b/366232719
Change-Id: I338747a1e689d6667ef02d327a88538ec2cdfdf8
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/899936
Reviewed-by: Ravi Mistry <rmistry@google.com>
Auto-Submit: Eric Boren <borenet@google.com>
Commit-Queue: Eric Boren <borenet@google.com>
2 files changed