Connects to Mongo (#10130)

* [mongo][ci mongo] use connection string to connect to mongo

* [ci mongo][style]

* [style][ci mongo]

* [style][ci mongo]

* [test] app and test runners wip

* [test] test runners wip

* [mongo][ci mongo] pass in conn opts from ui

* [mongo][ci mongo] test

* [test]

* [style] rm test file

* [mongo][ci mongo] use authdb if provided

* [ci mongo] add domain to hostname for dns-srv to work with localhost testing

* [ci mongo]

* [ci mongo] line len

* [ci mongo] actually use fqdn

* [ci mongo] lint

* [ci mongo] swap protocol depending on if host is fqdn

* [ci mongo] lint

* [ci mongo] fallback to non-srv

* [ci mongo] util fns are private

* [ci mongo] lint

* [ci mongo] inline

* [ci mongo] docstrings

* [ci mongo][test] basic tests for mongo conn options, wip

* [ci mongo][test] tests for mongo conn options, wip

* [ci mongo][i18n] exception string

* [ci mongo][style] refactor

* [ci mongo][style] refactor

* [ci mongo][style]

* [ci mongo][docs]

* [ci mongo] fqdn? true if >= 2 '.'s in hostname

* [ci mongo][srv?] srv toggle in mongo connection UI

* [ci mongo] doc

* [ci mongo] doc

* [ci mongo][ui] srv toggle works