[chore] Remove max_in_flight_size_mib option (#36707) #18323

Job	Run time
arm-unittest-matrix (receiver-0)	5m 44s
arm-unittest-matrix (receiver-1)	7m 26s
arm-unittest-matrix (receiver-2)	8m 43s
arm-unittest-matrix (receiver-3)	6m 37s
arm-unittest-matrix (processor-0)	3m 42s
arm-unittest-matrix (processor-1)	5m 2s
arm-unittest-matrix (exporter-0)	3m 10s
arm-unittest-matrix (exporter-1)	10m 16s
arm-unittest-matrix (exporter-2)	4m 25s
arm-unittest-matrix (exporter-3)	5m 22s
arm-unittest-matrix (extension)	5m 46s
arm-unittest-matrix (connector)	4m 22s
arm-unittest-matrix (internal)	7m 0s
arm-unittest-matrix (pkg)	4m 9s
arm-unittest-matrix (cmd-0)	1m 20s
arm-unittest-matrix (cmd-1)	1m 58s
arm-unittest-matrix (other)	4m 39s
arm-unittest	1s
	1h 29m 42s

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