MM-21626, MM-21627 - Plugin API/Hooks Prometheus instrumentati… (#13825)

* MM-21626,MM-21627 - Plugin API/Hooks Prometheus instrumentation

* Updated einterface mocks

* Fixed supervisor tests

* ignoring golint errors for plugin metrics wrappers

* Making golangci happy

* Using variadic form when generating wrapper code

* Removed artificial delay

* Removed comments from tests

* Renaming plugin wrappers to api/hooks_timer_layer

* updating vendor dir and mod files

* Recording plugin api/hook responses in prometheus

* Updated einterfaces-mocks

* Updating go sum

* Updating go sum

* Fixing conflicts

* More conflicts fixing

Co-authored-by: mattermod <mattermod@users.noreply.github.com>

web/web_test.go

@@ -226,7 +226,7 @@ func TestPublicFilesRequest(t *testing.T) {
 	defer os.RemoveAll(pluginDir)
 	defer os.RemoveAll(webappPluginDir)
 
-	env, err := plugin.NewEnvironment(th.App.NewPluginAPI, pluginDir, webappPluginDir, th.App.Log())
+	env, err := plugin.NewEnvironment(th.App.NewPluginAPI, pluginDir, webappPluginDir, th.App.Log(), nil)
 	require.NoError(t, err)
 
 	pluginID := "com.mattermost.sample"