Improve secondary geo nodes by disabling actions users cant perform
In https://gitlab.com/gitlab-org/gitlab-ee/issues/2524, we improved secondary geo nodes by ensuring that users always see a banner indicating that the node is secondary. This informs the user that they cannot make changes.
We should improve this by disabling actions (buttons) that users cannot perform and informing the user why with a tooltip indicating that the user should "Switch to the primary node to make changes."
This is an interim step until we can implement the flow that allows the user to create anyway, but when pressing submit we will use an API call to the primary in order to perform the action. See https://gitlab.com/gitlab-org/gitlab-ee/issues/3764