[exporterhelper] Introduce batching functionality #20281

Job	Run time
contrib-tests-matrix (receiver-0)	5m 14s
contrib-tests-matrix (receiver-1)	7m 27s
contrib-tests-matrix (receiver-2)	8m 37s
contrib-tests-matrix (receiver-3)	7m 0s
contrib-tests-matrix (processor)	4m 59s
contrib-tests-matrix (exporter-0)	9m 11s
contrib-tests-matrix (exporter-1)	7m 21s
contrib-tests-matrix (extension)	5m 40s
contrib-tests-matrix (connector)	3m 38s
contrib-tests-matrix (internal)	6m 3s
contrib-tests-matrix (pkg)	3m 28s
contrib-tests-matrix (cmd-0)	7m 11s
contrib-tests-matrix (cmd-1)	3m 44s
contrib-tests-matrix (other)	8m 43s
contrib_tests	1s
	1h 28m 17s

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