MM-8708 Remove api package (#8784)

* Remove api package

* Remove api dependency from cmd package

* Remove EnableAPIv3 setting

* Update web tests

* Add more websocket tests

* Move some ws and oauth tests to api4 package

* Move command tests into api4 package

* Test fixes

* Fix msg command test

* Add some app file tests

Makefile

@@ -496,8 +496,6 @@ clean: stop-docker ## Clean up everything except persistant server data.
 	rm -f mattermost.log
 	rm -f mattermost.log.jsonl
 	rm -f npm-debug.log
-	rm -f api/mattermost.log
-	rm -f api/mattermost.log.jsonl
 	rm -f .prepare-go
 	rm -f enterprise
 	rm -f cover.out