Improve e2e testing as part of the local-setup tests

[nexus49]

Implement the following improvements

• Open the link of an HTTPBin and see it working
• Create a bin in the default namespace
• Create a new namespace called test using the namespaces view
• Create a bin the test namespace
• Use the Namespace dropdown to filter for a particular namespace
• Try to use the downloaded OIDC kubeconfig to create/modify a resource

Authorization Tests

• login with a second users (possibly one that was invited before by the first user)
• validate that the user sees the not authorized page when navigating to an account the first user had created
• possibly navigate to an account that the first user has created, but where the second user was added as a member of
• Attempt to manage users and expect to fail (or expect buttons to be hidden/disabled)

Add a cli based test script

• Test the status of several backend resources:
  • Ready condition of all content Configurations in platform-mesh-system
  • Ready condition of all content Configurations for the httpbin-provider
  • Ready Condition for the Store resource in root:rogs
  • Ready Condition for identityproviderconfiguration in root:orgs:
  • Ready Condition for all WorkspaceTypes in root and root:orgs