Do use import again now with /plan and import feature from tmt

main.fmf

@@ -1,11 +1,5 @@
-summary: Run internal json-glib tests
+plan:
-discover:
+    import:
-    - name: Internal json-glib gating tests
-      how: fmf
         url: https://gitlab.cee.redhat.com/desktopqe/json-glib.git
-      path: /
+        name: /plan
         ref: rhel-9
-      filter: 'tag:gate'
-execute:
-    how: tmt
-