[PR #9754/b80fa80c backport][stable-10] clc_*: deprecation (#9761)

clc_*: deprecation (#9754)

* clc_*: deprecation

* Apply suggestions from code review

Co-authored-by: Felix Fontein <felix@fontein.de>

---------

Co-authored-by: Felix Fontein <felix@fontein.de>
(cherry picked from commit b80fa80c90)

Co-authored-by: Alexei Znamensky <103110+russoz@users.noreply.github.com>

plugins/modules/clc_group.py

@@ -14,6 +14,12 @@ module: clc_group
 short_description: Create/delete Server Groups at Centurylink Cloud
 description:
   - Create or delete Server Groups at Centurylink Centurylink Cloud.
+deprecated:
+  removed_in: 11.0.0
+  why: >
+    Lumen Public Cloud (formerly known as CenturyLink Cloud) has gone End-of-Life in September 2023.
+    See more at U(https://www.ctl.io/knowledge-base/release-notes/2023/lumen-public-cloud-platform-end-of-life-notice/?).
+  alternative: There is none.
 extends_documentation_fragment:
   - community.general.attributes
   - community.general.clc