mgr/dashboard: fix service page e2e tests

mgr/dashboard: fix service page e2e tests

- service page now uses defaults value for the placement count due to which mds test failing
- in test we pass "1" while "2" which is the default count for mds is already populated, making it 21 and causing unable to create mds service

Fixes: https://tracker.ceph.com/issues/66540
Signed-off-by: Afreen Misbah <afreen23.git@gmail.com>
(cherry picked from commit 5a718229dc43953f140a16342f19523a1c075863)
(cherry picked from commit 1da0a4f8cb234ef84729c24cc9a82397361e9534)

Conflicts:
	src/pybind/mgr/dashboard/frontend/cypress/e2e/pools/pools.e2e-spec.ts
	src/pybind/mgr/dashboard/frontend/cypress/e2e/pools/pools.po.ts