[MM-57066][MM-57329] Added metrics for all notification stopping points, consolidated categories between metrics and logging (#26799)

* [MM-57066] Add metric counters for notification events

* Some small changes

* Account for Metrics() sometimes being nil

* Fix test (again)

* Fix more tests

* A few changes from testing - added success counter

* Missed a mock

* Lint

* Add feature flag for notification monitoring

webapp/channels/package.json

@@ -13,7 +13,7 @@
     "@mattermost/client": "*",
     "@mattermost/compass-components": "^0.2.12",
     "@mattermost/compass-icons": "0.1.39",
-    "@mattermost/desktop-api": "5.8.0-4",
+    "@mattermost/desktop-api": "5.8.0-5",
     "@mattermost/types": "*",
     "@mui/base": "5.0.0-alpha.127",
     "@mui/material": "5.11.16",