pgw: Introduce test TC_gy_ccr_update_rejected

This test currently fails because open5gs-smfd is not triggering the
tear down in smf_gy_handle_cca_update_request().

Related: SYS#6845
Change-Id: Ie58ae2a5e870b183fa1c56c90c94f5eee56386e0
2 files changed