PLT-7641: Cleanup the jsonl files from make test (#7466)

* Disabled automatic log rotation to avoid multiple log file creation, added mattermost.log.jsonl files to gitignore

* Added log file delete to make clean

Makefile

@@ -455,8 +455,10 @@ clean: stop-docker
 	rm -rf logs
 
 	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