tests: Update the weekly and nightly tests to use v21.2

Note: There is an annoying work-around here for tests where we obtain
the gem5 resources repo directly to compile and run tests.

Change-Id: If8e7d3e7fd8dea9d0e1653e73360c295ad43e1ac
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/54469
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>
2 files changed