ceph: adapt the configuration past squid

The next lane moves to Tentacle, and two things in the testbed
configuration assume a Ceph release ceph-ansible can deploy.

The manager starts a ceph-ansible container whose tag on the latest
track follows ceph_version, so a Tentacle testbed asks for
ceph-ansible:tentacle, which does not exist: ceph-ansible has no branch
past squid. This lane is a nutshell lane, where python-osism selects the
Ceph backend and CEPH_STACK stays unset, so the cephadm switch on
CEPH_STACK does not reach it.

The Ceph configuration sets "rgw keystone api version". Tentacle removed
that option together with Keystone v2.0 support, and writing a removed
option is not ignored: ceph config set answers EINVAL and the cephadm
configuration play fails. Reef and squid still default it to 2, so it
cannot simply be dropped.

set-ceph-version.sh is where the Ceph release enters a latest testbed's
configuration, so decide both there: for any release other than
quincy, reef and squid, disable the ceph-ansible container and remove
the option from the Ceph environments. This matches cfg-cookiecutter,
which makes the same two decisions on the same release list. Running
the script again changes nothing further.

Assisted-by: Claude:claude-opus-5-5
Signed-off-by: Roger Luethi <luethi@osism.tech>

Author: ideaship

scripts/set-ceph-version.sh

@@ -19,3 +19,22 @@ if [[ "$(grep '^ceph_version:' /opt/configuration/environments/configuration.yml
 else
     sed -i -e '/^ceph_cluster_fsid: .*/a\' -e "ceph_version: ${VERSION}" /opt/configuration/environments/configuration.yml
 fi
+
+# ceph-ansible has no branch past squid. For any later Ceph release the manager
+# runs no ceph-ansible container -- there is no image for it -- and options the
+# release removed are dropped from the Ceph configuration: Tentacle removed
+# "rgw keystone api version" together with Keystone v2.0 support, and writing a
+# removed option fails the cephadm configuration play. Earlier releases still
+# default it to 2, so it stays for them.
+case $VERSION in
+    quincy|reef|squid)
+        ;;
+    *)
+        if ! grep -q '^ceph_ansible_enable:' /opt/configuration/environments/manager/configuration.yml; then
+            echo "ceph_ansible_enable: false" >> /opt/configuration/environments/manager/configuration.yml
+        fi
+        for file in /opt/configuration/environments/ceph*/configuration.yml; do
+            sed -i '/"rgw keystone api version":/d' "$file"
+        done
+        ;;
+esac