fix(actions): run get-disk-name on all workflow events

[gustavovalverde]

Motivation

While testing in #8908, a testing condition was not removed and merged into the main branch, which skips a required job for the cached states images to be found and attached to the instances.

Identified here: https://github.com/ZcashFoundation/zebra/actions/runs/11385606467/job/31676320538

Solution

• Remove the github.event_name == 'workflow_dispatch' condition that was used for testing in the PR

Tests

• All tests should pass here

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.