Deprecate support for unsupported drivers

The following three volume drivers are no longer supported, because
the storage products are now EOL[1].

 - Dell SC Series Storage Driver (iSCSI, FC)
 - Dell VNX Storage Driver (FC, iSCSI)
 - Dell XtremeIO Storage Driver (iSCSI, FC)

This deprecates support for these volume drivers, so that we can remove
these drivers after 2024.1 release.

[1] https://lists.openstack.org/archives/list/openstack-discuss@lists.openstack.org/thread/7D7GUOI66BOD7Z3ZQWPWYYHH6VHAY4JJ/

Depends-on: https://review.opendev.org/c/openstack/cinder/+/907346
Change-Id: I1fbe1a4788c3c39f73b94af2209318c64154dcf5

manifests/backend/dellemc_sc.pp

@@ -1,5 +1,6 @@
 # == define: cinder::backend::dellemc_sc
 #
+# DEPRECATED !!
 # Configure the Dell Storage Center Driver for cinder.
 #
 # === Parameters
@@ -134,6 +135,8 @@ define cinder::backend::dellemc_sc (
 
   include cinder::deps
 
+  warning('Support for Dell SC Series storage driver options has been deprecated.')
+
   $volume_driver = $sc_storage_protocol ? {
     'FC'    => 'cinder.volume.drivers.dell_emc.sc.storagecenter_fc.SCFCDriver',
     default => 'cinder.volume.drivers.dell_emc.sc.storagecenter_iscsi.SCISCSIDriver',

manifests/backend/dellemc_xtremio.pp

@@ -1,5 +1,6 @@
 # == define: cinder::backend::dellemc_xtremio
 #
+# DEPRECATED !!
 # Configure the Dell EMC XtremIO Driver for cinder.
 #
 # === Parameters
@@ -100,6 +101,8 @@ define cinder::backend::dellemc_xtremio (
 
   include cinder::deps
 
+  warning('Support for Dell XtremeIO storage driver options has been deprecated.')
+
   $driver = $xtremio_storage_protocol ? {
     'FC'    => 'dell_emc.xtremio.XtremIOFCDriver',
     default => 'dell_emc.xtremio.XtremIOISCSIDriver',

manifests/backend/emc_vnx.pp

@@ -1,8 +1,8 @@
 #
 # == Define: cinder::backend::emc_vnx
 #
+# DEPRECATED !!
 # Setup Cinder to use the EMC VNX driver.
-# Compatible for multiple backends
 #
 # == Parameters
 #
@@ -159,7 +159,8 @@ define cinder::backend::emc_vnx (
 ) {
 
   include cinder::deps
-  include cinder::params
+
+  warning('Support for Dell VNX storage driver options has been deprecated.')
 
   cinder_config {
     "${name}/default_timeout":                  value => $default_timeout;

releasenotes/notes/deprecate-dell-storage-drivers-caracal-cc59ab61edeee1bf.yaml

@@ -0,0 +1,10 @@
+---
+deprecations:
+  - |
+    The following defined resource types have been deprecated and will be
+    removed in a future release. These support options for the storage drivers
+    which are no longer supported because of product EOL.
+
+    - ``cinder::backends::delemc_sc``
+    - ``cinder::backends::delemc_xtremio``
+    - ``cinder::backends::emc_vnx``