RS: Added known issue for the metrics stream engine latency metrics to RS 7.22 release notes (#1585)

* RS: Added known issue for the metrics stream engine latency metrics to RS 7.22 release notes

* Removed RS155734 from known issues in RS 7.22 release notes

* Added RS155734 back to known issues for RS 7.22

Author: rrelledge

content/operate/rs/monitoring/db-availability.md

@@ -61,14 +61,4 @@ The following table shows the relationship between a database's status and avail
 
 ## Known issues
 
-- RS155734: Endpoint availability metrics do not work as expected due to a calculation error. As a workaround, use this query to measure availability:
-
-    ```sh
-    endpoint_server_became_unavailable{cluster="$cluster", db="$db"} 
-    - 
-    endpoint_server_available_again{cluster="$cluster", db="$db"}
-    ```
-
-    For up: 0-2
-
-    For down: 2-1000000
+- RS155734: Endpoint availability metrics do not work as expected due to a calculation error.

content/operate/rs/release-notes/rs-7-22-releases/_index.md

@@ -101,20 +101,12 @@ The following table provides a snapshot of supported platforms as of this Redis
 
 - RS131972: Creating an ACL that contains a line break in the Cluster Manager UI can cause shard migration to fail due to ACL errors.
 
-- RS155734: Endpoint availability metrics do not work as expected due to a calculation error. As a workaround, use this query to measure availability:
-
-    ```sh
-    endpoint_server_became_unavailable{cluster="$cluster", db="$db"} 
-    - 
-    endpoint_server_available_again{cluster="$cluster", db="$db"}
-    ```
-
-    For up: 0-2
-
-    For down: 2-1000000
+- RS155734: Endpoint availability metrics do not work as expected due to a calculation error.
 
 - RS156391: The `job_scheduler`'s memory usage can increase significantly when the diagnostic logging service is enabled.
 
+- RS153589: The metrics stream engine preview reports incorrect latency metrics.
+
 ## Known limitations
 
 #### Upload modules before OS upgrade

content/operate/rs/release-notes/rs-7-22-releases/rs-7-22-0-95.md

@@ -276,20 +276,12 @@ The following table shows the SHA256 checksums for the available packages:
 
 - RS131972: Creating an ACL that contains a line break in the Cluster Manager UI can cause shard migration to fail due to ACL errors.
 
-- RS155734: Endpoint availability metrics do not work as expected due to a calculation error. As a workaround, use this query to measure availability:
-
-    ```sh
-    endpoint_server_became_unavailable{cluster="$cluster", db="$db"} 
-    - 
-    endpoint_server_available_again{cluster="$cluster", db="$db"}
-    ```
-
-    For up: 0-2
-
-    For down: 2-1000000
+- RS155734: Endpoint availability metrics do not work as expected due to a calculation error.
 
 - RS156391: The `job_scheduler`'s memory usage can increase significantly when the diagnostic logging service is enabled.
 
+- RS153589: The metrics stream engine preview reports incorrect latency metrics.
+
 ## Known limitations
 
 #### Upload modules before OS upgrade