roachtest: tolerate errors on gracefuldraining test

[andrewbaptist]

Previously the test could return an ambiguous error if there was a combination of a RangeMismatchError and an AmbiguousError. This would request would be successful if the range info was updated and the request retried, but we don't do that today.

Informs: #129427 Epic: none

Release note: None

[cockroach-teamcity]

This change is 

[andrewbaptist]

I chatted with @arulajmani. The "correct" fix to DistSender is too complex. The reason the gossip change makes this more likely is due to additional rebalancing due to stale information from less frequent gossiping. It exposes a problem where we incorrectly return an ambiguous error, but this is rare enough that it is OK for now and the tracking issue can be used to determine if we eventually fix this.

[andrewbaptist]

TFTR

bors r=kvoli

[craig[bot]]

Build succeeded:

• linux_amd64_build
• examples_orms
• local_roachtest
• windows_build
• check_generated_code
• macos_arm64_build
• docker_image_amd64
• unit_tests
• lint
• macos_amd64_build
• linux_arm64_build
• linux_amd64_fips_build
• acceptance
• local_roachtest_fips

[blathers-crl[bot]]

Encountered an error creating backports. Some common things that can go wrong:

1. The backport branch might have already existed.
2. There was a merge conflict.
3. The backport branch contained merge commits.

You might need to create your backport manually using the backport tool.

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error creating merge commit from cfefe71cbde605be2208a65c74b993086155988c to blathers/backport-release-24.1-129829: POST https://api.github.com/repos/cockroachdb/cockroach/merges: 409 Merge conflict []

you may need to manually resolve merge conflicts with the backport tool.

Backport to branch 24.1.x failed. See errors above.

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error creating merge commit from cfefe71cbde605be2208a65c74b993086155988c to blathers/backport-release-24.2-129829: POST https://api.github.com/repos/cockroachdb/cockroach/merges: 409 Merge conflict []

you may need to manually resolve merge conflicts with the backport tool.

Backport to branch 24.2.x failed. See errors above.

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