fix(ci): fail cache disk creation if no db version is found

[gustavovalverde]

In some cases Zebra logs might not output the database version, and thus we should avoid creating a disk without a version.

Before this change, a disk was created without a db version number, just indicating a -v-, that caused other tests to fail as an actual version was not found in their regexes.

Motivation

Specifications & References

The expected output in logs is:

Zcash network: Mainnet
running state version: 26.0.0
initial disk state version: creating.new.database

Like in this example: https://github.com/ZcashFoundation/zebra/actions/runs/11584155837/job/32255694034#step:11:614

Sometimes this is not the output as the Diagnostic Metadata is not shown: https://github.com/ZcashFoundation/zebra/actions/runs/11526479010/job/32091165009#step:11:632

Solution

• If the version is not found, exit the Get database versions from logs step using an exit 1

Follow-up Work

• We should confirm why the Diagnostic Metadata is not shown in some instances
• Manually fix the version numbers in the already created disks in GCP

PR Author's Checklist

• The PR name will make sense to users.
• The PR provides a CHANGELOG summary.
• The solution is tested.
• The documentation is up to date.
• The PR has a priority label.

PR Reviewer's Checklist

• The PR Author's checklist is complete.
• The PR resolves the issue.

[arya2]

We should confirm why the Diagnostic Metadata is not shown in some instances

The added build metadata is actually unrelated, it would only happen when Zebra is compiled with the indexer feature, which isn't currently happening in CI.

In the case of the scan_start_where_left test, the shielded scanner was formerly a component of zebrad (behind the shielded-scan feature), but now it's running without starting Zebrad. The test could be updated to spawn a zebrad child (it's currently opening the state and reading blocks from it directly, and opening the state directly will still log the running version but in an unexpected format).