change(release): Add more cargo clean to the release checklist

[teor2345]

Motivation

We should do the same steps for release preparation and the actual release.
It's good to have a record of all the tests done on the release.

Solution

• add cargo clean to the release preparation steps
• ask release manager to put the cargo install output on the PR
• add --locked to the cargo install command

Review

This is a trivial update.

Reviewer Checklist

• Are the PR labels correct?
• Does the code do what the ticket and PR says?
• How do you know it works? Does it have tests?

Follow Up Work

Automate some of these steps.