mgr/dashboard: disable telemetry notification in e2e

mgr/dashboard: disable telemetry notification in e2e

After the new UI shell, the telemetry notifications are displayed on the
bottom side, which kind of exists on top of some buttons and that causes
some cypress failures while clicking Submit button in the form.

I am disabling the notification itself in e2e because its not checked in
the e2e at all so we can afford to disable it. Incase we decide to add
an e2e for the notification, we can just toggle it on later on and we
can check it

Fixes: https://tracker.ceph.com/issues/66506
Signed-off-by: Nizamudeen A <nia@redhat.com>