release-23.2: github-pull-request-make: pass timeout to stress directly

[blathers-crl]

Backport 1/1 commits from #114269 on behalf of @rickystewart.

/cc @cockroachdb/release

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We're seeing a lot of timeouts here. I think it's because the test timeouts are being passed incorrectly. If you look at a test run that timed out, the command looks like the following:

bazci test ... --test_arg=-test.timeout --test_arg=7m30s --test_timeout=660 ... -maxfails 1 -maxtime 10m0s -p 16

When you look at this, the problem may be obvious:

• We tell stress to run the test for up to 10 minutes; but
• We tell bazel the timeout for the test should be 7m30s.

In this way, it seems it's obvious tests are timing out.

The shorter timeout (7m30s) is meant to represent the timeout for the individual test process under-the-hood. To me that means that we should instead pass the timeout to stress as timeout, which is what this PR does.

Epic: none
Release note: None

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Release justification:

[blathers-crl]

Thanks for opening a backport.

Please check the backport criteria before merging:

• Backports should only be created for serious
  issues or test-only changes.
• Backports should not break backwards-compatibility.
• Backports should change as little code as possible.
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  here).
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  policy.

If your backport adds new functionality, please ensure that the following additional criteria are satisfied:

• There is a high priority need for the functionality that cannot wait until the next release and is difficult to address in another way.
• The new functionality is additive-only and only runs for clusters which have specifically “opted in” to it (e.g. by a cluster setting).
• New code is protected by a conditional check that is trivial to verify and ensures that it only runs for opt-in clusters. State changes must be further protected such that nodes running old binaries will not be negatively impacted by the new state (with a mixed version test added).
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  channel (#db-backports-point-releases or #db-backports-XX-X-release) for awareness and discussion.

Also, please add a brief release justification to the body of your PR to justify this
backport.

[blathers-crl]

It looks like your PR touches production code but doesn't add or edit any test code. Did you consider adding tests to your PR?

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[cockroach-teamcity]

This change is