MM-56876: Redis: first introduction (#27752)

```release-note
NONE
```

---------

Co-authored-by: Jesús Espino <jespinog@gmail.com>
Co-authored-by: Mattermost Build <build@mattermost.com>

server/einterfaces/mocks/MetricsInterface.go

@@ -403,6 +403,11 @@ func (_m *MetricsInterface) ObservePostsSearchDuration(elapsed float64) {
 	_m.Called(elapsed)
 }
 
+// ObserveRedisEndpointDuration provides a mock function with given fields: cacheName, operation, elapsed
+func (_m *MetricsInterface) ObserveRedisEndpointDuration(cacheName string, operation string, elapsed float64) {
+	_m.Called(cacheName, operation, elapsed)
+}
+
 // ObserveRemoteClusterClockSkew provides a mock function with given fields: remoteID, skew
 func (_m *MetricsInterface) ObserveRemoteClusterClockSkew(remoteID string, skew float64) {
 	_m.Called(remoteID, skew)