Double the number of exporter build-and-test groups #77365

Job	Run time
windows-unittest-matrix (receiver-0)	14m 51s
windows-unittest-matrix (receiver-1)	18m 52s
windows-unittest-matrix (receiver-2)	16m 9s
windows-unittest-matrix (receiver-3)	15m 52s
windows-unittest-matrix (processor)	16m 36s
windows-unittest-matrix (exporter-0)	11m 8s
windows-unittest-matrix (exporter-1)	17m 57s
windows-unittest-matrix (exporter-2)	12m 8s
windows-unittest-matrix (exporter-3)	11m 27s
windows-unittest-matrix (extension)	14m 23s
windows-unittest-matrix (connector)	9m 59s
windows-unittest-matrix (internal)	13m 24s
windows-unittest-matrix (pkg)	11m 40s
windows-unittest-matrix (cmd-0)	17m 48s
windows-unittest-matrix (cmd-1)	15m 29s
windows-unittest-matrix (other)	22m 8s
windows-unittest	4s
	3h 59m 55s

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