kv: deflake TestAdminDecommissionedOperations by setting server.shutdown.query_wait

[nvanbenschoten]

Fixes #107875.

This commit deflakes TestAdminDecommissionedOperations by setting the server.shutdown.query_wait cluster setting to 0s. This ensures that SQL queries are immediately canceled during the drain, instead of being let run for up to 10s (the previous test timeout) before cancellation.

The commit also increases the timeouts in the test to the default testutils timeouts, to avoid flakes when CI is slow.

Release note: None

[cockroach-teamcity]

This change is 

[nvanbenschoten]

TFTR!

bors r+

[craig]

Build failed (retrying...):

• Bazel Essential CI (Cockroach)

[craig]

Build succeeded:

• Bazel Essential CI (Cockroach)

[blathers-crl]

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 73f540d to blathers/backport-release-22.2-108227: 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 22.2.x failed. See errors above.

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error creating merge commit from 73f540d to blathers/backport-release-23.1-108227: 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 23.1.x failed. See errors above.

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