[connector/datadog] Remove feature gate connector.datadogconnector.pe… #73148

Job	Run time
windows-unittest-matrix (receiver-0)	14m 13s
windows-unittest-matrix (receiver-1)	16m 7s
windows-unittest-matrix (processor)	11m 22s
windows-unittest-matrix (exporter)	15m 58s
windows-unittest-matrix (extension)	13m 16s
windows-unittest-matrix (internal)	14m 41s
windows-unittest-matrix (pkg)	13m 11s
windows-unittest-matrix (cmd)	16m 11s
windows-unittest-matrix (other)	16m 14s
windows-unittest	0s
	2h 11m 13s

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