MM-51504: Control compliance export goroutine (#22604)

Spawn a goroutine from the server layer to have better
control for compliance tests.

https://mattermost.atlassian.net/browse/MM-51504

```release-note
NONE
```

Co-authored-by: Mattermost Build <build@mattermost.com>

server/channels/app/server.go

@@ -538,7 +538,7 @@ func (s *Server) runJobs() {
 	})
 
 	if complianceI := s.Channels().Compliance; complianceI != nil {
-		complianceI.StartComplianceDailyJob()
+		go complianceI.StartComplianceDailyJob()
 	}
 
 	if *s.platform.Config().JobSettings.RunJobs && s.Jobs != nil {