CI: Increase timeout for DevExtreme build job (DevExpress#32833)

Author: alexslavr

.github/workflows/testcafe_tests.yml

@@ -35,7 +35,7 @@ jobs:
     if: needs.check-should-run.outputs.should-run == 'true'
 
     runs-on: devextreme-shr2
-    timeout-minutes: 15
+    timeout-minutes: 30
 
     steps:
     - name: Get sources