chore(devfile) link v2 devfile to :3.15; set image refs to registry.redhat.io/devspaces/

Signed-off-by: Red Hat Devstudio Release Bot <nickboldt+devstudio-release@gmail.com>

Author: devstudio-release

devfile.yaml

@@ -4,7 +4,7 @@ metadata:
 components:
   - name: tools
     container:
-      image: registry.redhat.io/devspaces/udi-rhel8:3.14
+      image: registry.redhat.io/devspaces/udi-rhel8:3.15
       memoryLimit: '2Gi'
       memoryRequest: '1Gi'
       cpuLimit: '1'