[Chapel Merge] Remove Some Timeouts in PLBG Benchmarks

Branch: refs/heads/main
Revision: 75ebb719a9fad050390d3a55ff28cff077339fd9
Author: insertinterestingnamehere
Link: Remove Some Timeouts in PLBG Benchmarks by insertinterestingnamehere · Pull Request #28858 · chapel-lang/chapel · GitHub
Log Message:
Remove Some Timeouts in PLBG Benchmarks (#28858)

As best I can tell, these are no longer applicable on modern hardware
and they prevent the affected benchmarks from being run multiple times
by the benchmarking script (via the --numtrials flag).

[Contributed by @insertinterestingnamehere, reviewed and merged by @jabraham17]

Compare: Comparing c238d275bfe6adaa7be0ec55d2288d034ee2ec82...bc7efb141b93598ce8c3d29c016f13d49a8d733f · chapel-lang/chapel · GitHub

Diff:
D test/studies/shootout/k-nucleotide/bharshbarg/knucleotide-strings.perftimeout
D test/studies/shootout/nbody/bradc/nbody-blc-slice.perftimeout
D test/studies/shootout/nbody/sidelnik/nbody_forloop_3.perftimeout
https://github.com/chapel-lang/chapel/pull/28858.diff