Docs audit: Databases (#1472)

* updated docs strings and new examples for databases commands

* Fixed wait flag docs string for databases create

* Further doc string updates and example additions to database commands

* copy edits

* Database firewall rule doc string edit

* fixes issues caused by merge conflict in prior commit regarding db configuration commands

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Co-authored-by: Andrew Starr-Bochicchio <andrewsomething@users.noreply.github.com>