* add ratelimit to /sessions; cap userAgent version length; tests
* add MaxSessionsLimit; remove oldest session first; tests
* can't use slices in 1.20; improve test
* nits
* add GetLRUSessions; move limiting to CreateSession; remove rate limiting
* use queryBuilder
* mysql needs a limit when using offset
* update i18n
* refactor into limitNumberOfSessions; protect createSessionForUserAccessToken
* add comment to GetLRUSessions
* add limit to oauth path; PR comments
It was a good decision in hindsight to keep the public module as 0.x
because this would have been a breaking change again.
https://mattermost.atlassian.net/browse/MM-53032
```release-note
Changed the Go module path from github.com/mattermost/mattermost-server/server/v8 to github.com/mattermost/mattermost/server/v8.
For the public facing module, it's path is also changed from github.com/mattermost/mattermost-server/server/public to github.com/mattermost/mattermost/server/public
```
