feat(nova): make Helm timeout configurable - #4249

Build succeeded (check pipeline).
https://zuul.oss.vexxhost.dev/buildset/b8af0af5822f43a4a864b7ff74dc82cd

✔️ atmosphere-molecule-aio-openvswitch SUCCESS in 1h 37m 47s
✔️ atmosphere-molecule-aio-ovn SUCCESS in 1h 41m 20s
✔️ atmosphere-molecule-csi-local-path-provisioner SUCCESS in 9m 12s
✔️ atmosphere-molecule-csi-rbd SUCCESS in 17m 31s
✔️ atmosphere-molecule-keycloak SUCCESS in 21m 04s