tests: Add GPU ISA parameter to nightly/weekly

GCN3_X86 and VEGA_X86 can use the same test binaries to run tests for
that build configuration. This adds an option to the nightly and weekly
test scripts to select which GPU ISA to test. By default the GCN3_X86
ISA is tested which was previously the only test. No behavior is changed
from current testing.

Change-Id: Ifedcdea5d7c1c8e9994559a20aea5e1954180772
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/54083
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Maintainer: Matt Sinclair <mattdsinclair@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
2 files changed