release-23.2: Update pkg/testutils/release/cockroach_releases.yaml

[cockroach-teamcity]

Update pkg/testutils/release/cockroach_releases.yaml with recent values.

Epic: None
Release note: None
Release justification: test-only updates

[blathers-crl]

Thanks for opening a backport.

Before merging, please confirm that it falls into one of the following categories (select one):

• Non-production code changes. Includes test-only changes, build system changes, etc.
• Fixes for serious issues. Defined in the policy as correctness, stability, or security issues, data corruption/loss, significant performance regressions, breaking working and widely used functionality, or an inability to detect and debug production issues.
• Other approved changes. These changes must be gated behind a disabled-by-default feature flag unless there is a strong justification not to.

Add a brief release justification to the PR description explaining your selection.

Also, confirm that the change does not break backward compatibility and complies with all aspects of the backport policy.

All backports must be reviewed by the TL and EM for the owning area.

[blathers-crl]

✅ PR #155296 is compliant with backport policy

Confidence: high
Backward compatible: true
Explanation: The PR is compliant with the backport policy because it only modifies a file located under a directory pattern designated for test utilities (pkg/testutils/). According to the backport policy, changes that affect only non-production code, including test utilities, are exempt from the standard requirements including critical bug fix justification or feature flag gating.

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

[cockroach-teamcity]

This change is