Dashboard Schema V2: E2E setup (#99843)

* basic setup

* update CODEOWNERS

* update name

* add temp test that ensures we are loading schema V2 json in the UI

* update language

* test with yarn cache and combine steps

* revert combine

* remove commented out code

* Run current dashboard suite, make workflow optional

* make job always succeed

* Remove temp v2 suite

* don't run on draft PRs

* command for old arch

.github/CODEOWNERS

@@ -791,6 +791,7 @@ embed.go @grafana/grafana-as-code
 /.github/workflows/publish-kinds-release.yml @grafana/platform-monitoring
 /.github/workflows/verify-kinds.yml @grafana/platform-monitoring
 /.github/workflows/dashboards-issue-add-label.yml @grafana/dashboards-squad
+/.github/workflows/run-schema-v2-e2e.yml  @grafana/dashboards-squad
 /.github/workflows/ephemeral-instances-pr-comment.yml @grafana/grafana-backend-services-squad
 /.github/workflows/create-security-patch-from-security-mirror.yml @grafana/grafana-developer-enablement-squad
 /.github/workflows/core-plugins-build-and-release.yml @grafana/plugins-platform-frontend @grafana/plugins-platform-backend