backup: disable AC in datadriven tests

[dt]

These tests, via 'new-cluster', run a large number of nodes in a single process, overloading that process and causing bulk work to starve if it is restricted to using strictly spare capacity (of which there is none).

Release note: none. Epic: none.

[cockroach-teamcity]

This change is 

[dt]

TFTR!

bors r+

[craig[bot]]

Build succeeded:

• local_roachtest
• docker_image_amd64
• unit_tests
• linux_amd64_fips_build
• local_roachtest_fips
• examples_orms
• linux_amd64_build
• acceptance
• check_generated_code
• lint

[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 backport branch refs/heads/blathers/backport-release-26.1-159281: POST https://api.github.com/repos/dt/cockroach/git/refs: 403 Resource not accessible by integration []

Backport to branch 26.1.x failed. See errors above.

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_{:owl: Hoot! I am a Blathers, a bot for CockroachDB. My owner is dev-inf.}