[chore]: [deltatocumulative]: remove nested implementation (#36498) #17282

Job	Run time
arm-unittest-matrix (receiver-0)	5m 19s
arm-unittest-matrix (receiver-1)	6m 44s
arm-unittest-matrix (receiver-2)	8m 36s
arm-unittest-matrix (receiver-3)	6m 21s
arm-unittest-matrix (processor-0)	3m 22s
arm-unittest-matrix (processor-1)	4m 30s
arm-unittest-matrix (exporter-0)	3m 19s
arm-unittest-matrix (exporter-1)	9m 30s
arm-unittest-matrix (exporter-2)	4m 11s
arm-unittest-matrix (exporter-3)	4m 48s
arm-unittest-matrix (extension)	5m 6s
arm-unittest-matrix (connector)	3m 53s
arm-unittest-matrix (internal)	6m 1s
arm-unittest-matrix (pkg)	3m 30s
arm-unittest-matrix (cmd-0)	1m 8s
arm-unittest-matrix (cmd-1)	1m 53s
arm-unittest-matrix (other)	4m 8s
arm-unittest	1s
	1h 22m 20s

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