Find a good way to reduce the toil related to refreshing wiremock recordings of Sigstore/TUF used in acceptance tests

[simonbaird]

Background:

• Using production Sigstore gives 6 month expiration.
• Using stage Sigstore gives shorter expiration.
• Spinning up a local instance does work but it's resource intensive, (could run in GitHub though).
• Could we somehow produce a 100 year expiration for test data and never worry about this again?

See also:

• Use Sigstore staging for test recordings #1577 and Use workflow to refresh TUF recordings for acceptance tests #1622