Moving diagnostics into a service (#14832)

* Moving diagnostics into a service

* Fixing golint checks

* Fixing tests

* Renaming from diagnostics to telemetry

* Adding missing files

* Initializing telemetry earlier in the server startup

* Fixing tests

* Adding a log for the telemetryID initialization error

* Addressing PR review comments

* Fixing merge problem

* Removing some extra Diagnostics mentions

* Making tests pass

api4/license.go

@@ -185,7 +185,7 @@ func requestTrialLicense(c *Context, w http.ResponseWriter, r *http.Request) {
 	}
 
 	trialLicenseRequest := &model.TrialLicenseRequest{
-		ServerID:              c.App.DiagnosticId(),
+		ServerID:              c.App.TelemetryId(),
 		Name:                  currentUser.GetDisplayName(model.SHOW_FULLNAME),
 		Email:                 currentUser.Email,
 		SiteName:              *c.App.Config().TeamSettings.SiteName,