mon: ceph pg repeer should propose a correctly sized pg temp.

Fixes: https://tracker.ceph.com/issues/73897
Signed-off-by: Alex Ainscow <aainscow@uk.ibm.com>
(cherry picked from commit a3cc500a543d1c2fb9e1d55c144e0a041e3d1f80)

Merge pull request #65830 from soumyakoduri/wip-skoduri-tentacle

[rgw][tentacle] backport of cloud-restore related PRs

Reviewed-by: J. Eric Ivancich <ivancich@redhat.com>