V16: Show modal when publishing invariant content (#19159)

* fix: the publish action should use the publish modal

* feat: allows the publish modal to handle invariant data

* chore: rearrange the unpublish action & modal so they are one-for-one alike with publishing

* Updated acceptance tests - add steps to interact with publish modal

* Added tests for publish variant content

* Bumped version of test helper

* feat: adds text to indicate you are about to publish

---------

Co-authored-by: Nhu Dinh <hnd@umbraco.dk>

tests/Umbraco.Tests.AcceptanceTest/package.json

@@ -20,8 +20,8 @@
     "typescript": "^4.8.3"
   },
   "dependencies": {
-    "@umbraco/json-models-builders": "^2.0.31",
-    "@umbraco/playwright-testhelpers": "^16.0.5",
+    "@umbraco/json-models-builders": "^2.0.33",
+    "@umbraco/playwright-testhelpers": "^16.0.7",
     "camelize": "^1.0.0",
     "dotenv": "^16.3.1",
     "node-fetch": "^2.6.7"