V14 QA Refactor code of Partial View acceptance tests (#15325)

* Refactor acceptance tests for Partial View

* Refactor api tests for Partial View

* Bumped version of Test Helper

* Added suggestion from review

* Bumped version to testhelpers 2.0.8

---------

Co-authored-by: Andreas Zerbst <andr317c@live.dk>

tests/Umbraco.Tests.AcceptanceTest/package.json

@@ -21,7 +21,7 @@
   },
   "dependencies": {
     "@umbraco/json-models-builders": "^1.0.6",
-    "@umbraco/playwright-testhelpers": "^2.0.0-beta.7",
+    "@umbraco/playwright-testhelpers": "^2.0.0-beta.8",
     "camelize": "^1.0.0",
     "dotenv": "^16.3.1",
     "faker": "^4.1.0",