Add new opensips-mi task #13

Job	Run time
opensips / setup-matrix	7s
opensips / test (accounting, ubuntu-latest)	1m 36s
opensips / test (auth, ubuntu-latest)	2m 8s
opensips / test (b2b, ubuntu-latest)	6m 42s
opensips / test (dialog, ubuntu-latest)	2m 44s
opensips / test (permissions, ubuntu-latest)	1m 4s
opensips / test (presence, ubuntu-latest)	53s
opensips / test (record-route, ubuntu-latest)	52s
opensips / test (registration, ubuntu-latest)	4m 24s
opensips / test (startup, ubuntu-latest)	1m 23s
opensips / test (stir-shaken, ubuntu-latest)	4m 54s
opensips / test (topology-hiding, ubuntu-latest)	2m 51s
opensips / test (uac-auth, ubuntu-latest)	2m 55s
	32m 33s

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