mgr/dashboard: Add full page tearsheet component

mgr/dashboard: Add full page tearsheet component

Fixes https://tracker.ceph.com/issues/74327

-  added "full" page tearsheet
-  the full page tearsheet uses a cancel confirmation modal hence added that as well
-  as per latest carbon guidelines for tearsheet https://carbondesignsystem.com/community/patterns/create-flows/#anatomy-of-a-full-page
-  not added - influencer title and toggle (should be added as per reqs)

Signed-off-by: Afreen Misbah <afreen@ibm.com>
(cherry picked from commit d26e0af8a9a9e8bc487232c0ae43e862ddee3349)

 Conflicts:
	src/pybind/mgr/dashboard/frontend/src/app/shared/components/tearsheet/tearsheet.component.scss