ceph: add vault kms support for osd encryption

When the Ceph cluster runs on PVC and the OSDs are encrypted we can
store LUKS's Key Encryption Key inside a Key Management System. Today,
Rook only supports HashiCorp Vault: https://www.vaultproject.io/

The CephCluster has now a new "security" field which will plug onto the
KMS. Here is an example:

security:
  kms:
    tokenSecretName: <name of the secret containing a Vault token, used
    to authenticate>
    connectionDetails: < a map of strings containing connection
    information>

Refer to the ceph-cluster-crd documentation to lear more.

Closes: https://github.com/rook/rook/issues/6105
Signed-off-by: Sébastien Han <seb@redhat.com>

.github/workflows/codegen.yml

@@ -16,5 +16,5 @@ jobs:
       run: GOPATH=$(go env GOPATH) make codegen
 
     - name: validate codegen
-      run: hack/validate_modified_files.sh codegen
+      run: tests/scripts/validate_modified_files.sh codegen