RTIO: Add SPI default submit handler #131296

Job	Run time
twister-build-prep	3m 42s
twister-build (1)	37m 51s
twister-build (2)	28m 58s
twister-build (3)	31m 28s
twister-build (4)	37m 56s
twister-build (5)	19m 34s
twister-build (6)	22m 1s
twister-build (7)	29m 35s
Publish Unit Tests Results	22s
Check Twister Status / all jobs passed	1s
	3h 31m 28s

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