More notification metrics fixes (#26889)

* Explicitly have the client tell the server when it should expect an ACK

* Don't count missing profile errors for your own posts, added comment

* Fix test

* Make postedAck a parameter in WebSocketClient

* Snapshot fixes

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

webapp/channels/src/plugins/pluggable/__snapshots__/pluggable.test.tsx.snap

@@ -115,6 +115,7 @@ exports[`plugins/Pluggable should match snapshot with extended component 1`] = `
           "messageListeners": Set {},
           "missedEventCallback": null,
           "missedMessageListeners": Set {},
+          "postedAck": false,
           "reconnectCallback": null,
           "reconnectListeners": Set {},
           "responseCallbacks": Object {},
@@ -248,6 +249,7 @@ exports[`plugins/Pluggable should match snapshot with extended component with pl
           "messageListeners": Set {},
           "missedEventCallback": null,
           "missedMessageListeners": Set {},
+          "postedAck": false,
           "reconnectCallback": null,
           "reconnectListeners": Set {},
           "responseCallbacks": Object {},
@@ -507,6 +509,7 @@ exports[`plugins/Pluggable should match snapshot with null pluggableId 1`] = `
           "messageListeners": Set {},
           "missedEventCallback": null,
           "missedMessageListeners": Set {},
+          "postedAck": false,
           "reconnectCallback": null,
           "reconnectListeners": Set {},
           "responseCallbacks": Object {},
@@ -641,6 +644,7 @@ exports[`plugins/Pluggable should match snapshot with valid pluggableId 1`] = `
           "messageListeners": Set {},
           "missedEventCallback": null,
           "missedMessageListeners": Set {},
+          "postedAck": false,
           "reconnectCallback": null,
           "reconnectListeners": Set {},
           "responseCallbacks": Object {},