[Chapel Merge] Bump the `--walltime` for the SHOC Triad correctness test

Branch: refs/heads/main
Revision: 55daccfeee949dfca60952ff1f2dc200798f4f1b
Author: dlongnecke-cray
Link: Bump the `--walltime` for the SHOC Triad correctness test by dlongnecke-cray · Pull Request #29474 · chapel-lang/chapel · GitHub
Log Message:
Bump the --walltime for the SHOC Triad correctness test (#29474)

This PR doubles the --walltime of the SHOC Triad correctness test as a
temporary measure to clean up nightly testing.

Compare: Comparing c45e5fc889176468512d8aa3d10d30e014988fac...2079eebb95311d68f0bf41b4fc8e02b60e3a74bb · chapel-lang/chapel · GitHub

Diff:
A test/gpu/native/studies/shoc/triad.lastexecopts
https://github.com/chapel-lang/chapel/pull/29474.diff