[ui] Actions implementation in the web UI (#18793)

* runAction model and adapter funcs

* Hacky but functional action running from job index

* remove proxy hack

* runAction added to taskSubRow

* Added tty and ws_handshake to job action endpoint call

* delog

* Bunch of streaming work

* action started, running, and finished notification titles, neutral color, and ansi escape

* Handle random alloc selection in the web ui

* Run on All implementation in web ui

* [ui] Helios two-step button and uniform title bar for Actions (#18912)

* Initial pass at title bar button uniformity

* Vertical align on actions dropdown toggle and small edits to prevent keynav overflow issue

* We represent loading state w text and disable now

* Pageheader component to align buttons

* Buttons standardized

* Actions dropdown reveal for multi-alloc job

* Notification code styles

* An action-having single alloc job

* Mirageed

* Actions-laden jobs in mirage

* Separating allocCount and taskCount in mirage mocks

* Unbreak stop job tests

* Permissions for actions dropdown

* tests for running actions from the job index page

* running from a task row actions tests

* some todocleanup

* PR feedback addressed, including page helper for actions

ui/mirage/models/action.js

@@ -0,0 +1,10 @@
+/**
+ * Copyright (c) HashiCorp, Inc.
+ * SPDX-License-Identifier: BUSL-1.1
+ */
+
+import { Model, belongsTo } from 'ember-cli-mirage';
+
+export default Model.extend({
+  task: belongsTo('task'),
+});