[MM-27623] Add new session prop for oauth (#15221)

* Add new session prop for oauth

* Make it isOAuthUser to differentiate better

* Fix up caps

* Fix tests

* Add tests for IsOAuthUser

app/opentracing/opentracing_layer.go

@@ -3111,7 +3111,7 @@ func (a *OpenTracingAppLayer) DoLocalRequest(rawURL string, body []byte) (*http.
 	return resultVar0, resultVar1
 }
 
-func (a *OpenTracingAppLayer) DoLogin(w http.ResponseWriter, r *http.Request, user *model.User, deviceId string, isMobile bool, isOAuth bool, isSaml bool) *model.AppError {
+func (a *OpenTracingAppLayer) DoLogin(w http.ResponseWriter, r *http.Request, user *model.User, deviceId string, isMobile bool, isOAuthUser bool, isSaml bool) *model.AppError {
 	origCtx := a.ctx
 	span, newCtx := tracing.StartSpanWithParentByContext(a.ctx, "app.DoLogin")
 
@@ -3123,7 +3123,7 @@ func (a *OpenTracingAppLayer) DoLogin(w http.ResponseWriter, r *http.Request, us
 	}()
 
 	defer span.Finish()
-	resultVar0 := a.app.DoLogin(w, r, user, deviceId, isMobile, isOAuth, isSaml)
+	resultVar0 := a.app.DoLogin(w, r, user, deviceId, isMobile, isOAuthUser, isSaml)
 
 	if resultVar0 != nil {
 		span.LogFields(spanlog.Error(resultVar0))