main.star: add linux-arm64 ASAN/MSAN builders

linux-arm64 is a first class port with no coverage of ASAN or MSAN
modes. We already have a clang15 builder, so adding ASAN and MSAN should
be trivial (fingers crossed).

For golang/go#71395.
For golang/go#70054.

Change-Id: I6a6a636c7a41147b1b22933db946ca838d3696f4
Reviewed-on: https://go-review.googlesource.com/c/build/+/643918
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Commit-Queue: Michael Pratt <mpratt@google.com>
Auto-Submit: Michael Pratt <mpratt@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
6 files changed