Tweak GPG cleanup attempts

What does this MR do?

Increase the number of attempts for gpg cleanup

By default Retriable would only try 3 times. Which would never hit our limit of 10s in sidekiq. Raising the number of tries means we'll only be limited by the maximum runtime.

Increase the gpg-cleanup time on web nodes

In 0.5 seconds we were able to try the cleanup about 3 times. In 1 second we can try about 5 times.

Hopefully this will leave less dangling processes.

This was discussed in #20918 (closed)

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers