Revert "Remove documentation of 200.012 obsolete alarm (r7, dsr7)"

This reverts commit 299514c9f6.

Reason for revert: This is related to a software change in the active release: Stx 8.0. The doc change is only required in the active branch.

Change-Id: I6aec0937d7dc534a61c26ec52cb7a0fe9f744bfb

doc/source/fault-mgmt/kubernetes/200-series-alarm-messages.rst

@@ -217,6 +217,26 @@ health of the system.
 
 -----
 
+.. list-table::
+   :widths: 6 25
+   :header-rows: 0
+
+   * - **Alarm ID: 200.012**
+     - <hostname> controller function has in-service failure while compute
+       services remain healthy.
+   * - Entity Instance
+     - host=<hostname>
+   * - Degrade Affecting Severity:
+     - Major
+   * - Severity:
+     - C\*
+   * - Proposed Repair Action
+     - Lock and then Unlock host to recover. Avoid using 'Force Lock' action
+       as that will impact compute services running on this host. If lock action
+       fails then contact next level of support to investigate and recover.
+
+-----
+
 .. list-table::
    :widths: 6 25
    :header-rows: 0