mgr/dashboard: fix timeout error in dashboard cephadm e2e job

mgr/dashboard: fix timeout error in dashboard cephadm e2e job

1. Fix the timeout error happening in the dashboard e2e job
2. Take care of the flaky force maintenance check

Most of the time our test is getting timed out while searching for an item
in the table. Its because `.clear().type()` is not clearing the content
in the search field sometimes and that creates a wrong data to be
entered into the search field and it starts searching based on this
wrong name. To avoid this I am explicitly clearing the search area
before typing.

Fixes: https://tracker.ceph.com/issues/53672
Signed-off-by: Nizamudeen A <nia@redhat.com>