[infra] Add jobs for MacBookPro 15,1

These are new machines in the new lab. Also, add the "mac_model"
dimension where applicable.

Bug: b/395975653
Change-Id: I3415cdc8e7f4e1682084b60325ecccf58958faf6
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/964097
Reviewed-by: Kaylee Lubick <kjlubick@google.com>
Commit-Queue: Eric Boren <borenet@google.com>
Auto-Submit: Eric Boren <borenet@google.com>
3 files changed