V16 Added acceptance tests for issue #17753 (#19876)

* Added tests for updating a variant block list with invalid text

* Added tests for updating a variant block grid with invalid text

* Bumped version of test helper

* Make the tests for updating content with invalid text in a block run in the pipeline

* Cleaned up

* Updated test text

* Reverted npm command

tests/Umbraco.Tests.AcceptanceTest/package.json

@@ -22,7 +22,7 @@
   },
   "dependencies": {
     "@umbraco/json-models-builders": "^2.0.37",
-    "@umbraco/playwright-testhelpers": "^16.0.33",
+    "@umbraco/playwright-testhelpers": "^16.0.34",
     "camelize": "^1.0.0",
     "dotenv": "^16.3.1",
     "node-fetch": "^2.6.7"