[MM-53102] Add support for multi-word highlights without notifications in web (#24050)

- Adds a new section under settings/notifications for adding custom multi-word keywords that get highlighted without notification
- Adds a new classname for highlighting words although the styling is the same as mentions highlights
- Added a few components to the ReduxFromProps pattern
- Adds supported type for the hook of PluginComponent type
- Add upsell for highlight without notification
- Moved 'setting_item.tsx' to the components folder
- Improved prop names and function structure for setting_item, setting_item_max and setting_item_min
- Moved 'toggle_modal_button.tsx' to the components folder
- Removed t and utility messages from a few components
- Fixed bug where the tooltip was not getting rendered on restrictedButtons
- Improved the mobile view of the settings modal
- Adds E2E for the feature

webapp/channels/src/components/integrations/installed_outgoing_webhooks/__snapshots__/installed_outgoing_webhooks.test.tsx.snap

@@ -48,6 +48,7 @@ exports[`components/integrations/InstalledOutgoingWebhooks should match snapshot
           "desktop_sound": "false",
           "email": "false",
           "first_name": "false",
+          "highlight_keys": "",
           "mark_unread": "mention",
           "mention_keys": "",
           "push": "none",
@@ -155,6 +156,7 @@ exports[`components/integrations/InstalledOutgoingWebhooks should match snapshot
           "desktop_sound": "false",
           "email": "false",
           "first_name": "false",
+          "highlight_keys": "",
           "mark_unread": "mention",
           "mention_keys": "",
           "push": "none",