We added the SSH key notice to the repository form to match something we had done for RBCommons, but did so in a way that wasn't extensible for cases such as when the create SSH key link is different. This change moves it out into its own template so we can replace it if we want. This also fixes the error notice for when a hosting service account was linked to use the ``form`` variable instead of ``adminform``. Testing Done: Verified that the SSH key notice still looked correct in the repository form.