MM-52282 Remove ExperimentalSettings.PatchPluginsReactDOM (#23172)

* MM-52282 Remove ExperimentalSettings.PatchPluginsReactDOM

* Fix missing file from last commit

* Fix test usage of plugin.NewEnvironment

server/platform/services/telemetry/telemetry.go

@@ -758,7 +758,6 @@ func (ts *TelemetryService) trackConfig() {
 		"enable_shared_channels":              *cfg.ExperimentalSettings.EnableSharedChannels,
 		"enable_remote_cluster_service":       *cfg.ExperimentalSettings.EnableRemoteClusterService && cfg.FeatureFlags.EnableRemoteClusterService,
 		"enable_app_bar":                      *cfg.ExperimentalSettings.EnableAppBar,
-		"patch_plugins_react_dom":             *cfg.ExperimentalSettings.PatchPluginsReactDOM,
 		"disable_refetching_on_browser_focus": *cfg.ExperimentalSettings.DisableRefetchingOnBrowserFocus,
 		"delay_channel_autocomplete":          *cfg.ExperimentalSettings.DelayChannelAutocomplete,
 	})