Make sure all `Edit` pages have edit breadcrumb

The following discussion from !152603 (merged) should be addressed:

  • @thutterer started a discussion: (+4 comments)

    @jeeyo @annabeldunstone There is still a small issue with the latest version:

    • The last breadcrumb always should be the current page. In this case "Edit". This one is still missing.
    • The breadcrumb that shows the environment's name should link to the environment's show view. It currently points to edit.

    Both can be fixed with this update:

    - add_to_breadcrumbs _("Environments"), project_environments_path(@project)
- add_to_breadcrumbs @environment.name, project_environment_path(@project, @environment)
- breadcrumb_title _("Edit")
    without this patch with this patch
    recording_1715690666 recording_1715690806

    We should also cover this fix with a feature spec.

    @jeeyo Are you familiar with rspec and can provide such a spec? No problem if not. We can merge your fix without and create a follow-up issue for us to write that spec later. Just let me know which way you prefer 🤙