E2E: Add plugin-e2e scenario verification tests (#79969)

* add playwright test and plugin-e2e

* run tests in ci

* add ds config tests

* add panel edit tests

* add annotation test

* add variable edit page tests

* add explore page tests

* add panel plugin tests

* add readme

* remove comments

* fix broken test

* remove user.json

* remove newline in starlark

* fix lint issue

* ignore failure of playwright tests

* update code owners

* add detailed error messages in every expect

* update message frame

* fix link

* upload report to gcp

* echo url

* add playwright developer guide

* bump plugin-e2e

* add custom provisioning dir

* update plugin-e2e

* remove not used imports

* fix typo

* minor fixes

* use latest version of plugin-e2e

* fix broken link

* use latest plugin-e2e

* add feature toggle scenario verification tests

* bump version

* use auth file from package

* fix type error

* add panel data assertions

* rename parent dir and bump version

* fix codeowners

* reset files

* remove not used file

* update plugin-e2e

* separate tests per role

* pass prov dir

* skip using provisioning fixture

* wip

* fix permission test

* move to e2e dir

* fix path to readme

* post comment with report url

* format starlark

* post comment with report url

* post comment with report url

* fix token

* make test fail

* fix exit code

* bump version

* bump to latest plugin-e2e

* revert reporting message

* remove comments

* readding report comment

* change exit code

* format starlark

* force test to fail

* add new step that posts comment

* fix link

* use latest playwright image

* fix failing test

* format starlark

* remove unused fixture

Co-authored-by: Marcus Andersson <marcus.andersson@grafana.com>

---------

Co-authored-by: Marcus Andersson <marcus.andersson@grafana.com>

.github/CODEOWNERS

@@ -306,6 +306,7 @@
 /public/app/core/internationalization/ @grafana/grafana-frontend-platform
 /e2e/ @grafana/grafana-frontend-platform
 /e2e/cloud-plugins-suite/ @grafana/partner-datasources
+/e2e/plugin-e2e/plugin-e2e-api-tests/ @grafana/plugins-platform-frontend
 /packages/ @grafana/grafana-frontend-platform @grafana/plugins-platform-frontend
 /packages/grafana-e2e-selectors/ @grafana/grafana-frontend-platform
 /packages/grafana-e2e/ @grafana/grafana-frontend-platform
@@ -365,6 +366,7 @@
 /.husky/pre-commit @grafana/frontend-ops
 /cypress.config.js @grafana/grafana-frontend-platform
 /.levignore.js @grafana/plugins-platform-frontend
+playwright.config.ts @grafana/plugins-platform-frontend
 
 
 # public folder