Merge pull request juju#17375 from manadart/dqlite-fix-secrets-state

juju#17375

This change is mechanical only and is constituted by:
- Indentation of SQL/DML according to our agreed-upon standards.
- Shortened line lengths - 120 for code, and 80 for comments.
- Corrected method names in comments.
- Removal of redundant object creation for supply as SQLair type samples.
- Removal of redundant slice creation for appending to SQLair type samples.