twister: add instance name as default parameter #148750

Job	Run time
twister-build-prep / prep_push	0s
twister-build-prep / prep_pr	3m 17s
twister-build (1)	53m 42s
twister-build (2)	1h 3m 32s
twister-build (3)	56m 11s
twister-build (4)	1h 4m 48s
twister-build (5)	33m 51s
twister-build (6)	37m 28s
twister-build (7)	46m 24s
Publish Unit Tests Results	10s
Check Twister Status / all jobs passed	1s
	5h 59m 24s

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