release-24.3: 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 #155295 is compliant with backport policy

Confidence: high
Backward compatible: true
Explanation: The pull request modifies files exclusively within the 'pkg/testutils/' path, which falls under the non-production file patterns as specified. Since the changes affect test utilities, they are exempt from the standard backport policy requirements. The PR description also explicitly states 'Release justification: test-only updates', aligning with the policy for test-only and non-production changes. This justification and the file path collectively establish policy compliance.

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

[cockroach-teamcity]

This change is