Merge pull request #62215 from rkachach/fix_mgmt_gw_ha

mgr/cephadm: refactor oauth2-proxy certs and cookie-secret handling

Reviewed-by: Adam King <adking@redhat.com>

diff --cc src/pybind/mgr/cephadm/templates/services/mgmt-gateway/nginx.conf.j2
Simple merge

diff --cc src/pybind/mgr/cephadm/tests/test_services.py
Simple merge

diff --cc src/python-common/ceph/deployment/service_spec.py
Simple merge