chore: add portal-designer to devstack #593

Job	Run time
run_ci (ubuntu-20.04, 3.11, discovery+lms+forum)	21m 43s
run_ci (ubuntu-20.04, 3.11, registrar+lms)	16m 36s
run_ci (ubuntu-20.04, 3.11, ecommerce+lms)	22m 31s
run_ci (ubuntu-20.04, 3.11, edx_notes_api+lms)	17m 3s
run_ci (ubuntu-20.04, 3.11, credentials+lms)	17m 48s
run_ci (ubuntu-20.04, 3.11, xqueue)	2m 51s
run_ci (ubuntu-20.04, 3.11, analyticsapi+insights+lms)	22m 26s
run_ci (ubuntu-20.04, 3.11, designer+lms)	22m 20s
run_ci (ubuntu-20.04, 3.11, enterprise-catalog+enterprise-access+lms)	23m 0s
run_ci (ubuntu-20.04, 3.11, license-manager+lms)	17m 17s
	3h 3m 35s

Provide feedback