[chore] Fix data race on windowseventlogreceiver tests #94743

Job	Run time
windows-unittest-matrix (receiver-0)	11s
windows-unittest-matrix (receiver-1)	6s
windows-unittest-matrix (receiver-2)	2s
windows-unittest-matrix (receiver-3)	3s
windows-unittest-matrix (processor-0)	6s
windows-unittest-matrix (processor-1)	4s
windows-unittest-matrix (exporter-0)	7s
windows-unittest-matrix (exporter-1)	2s
windows-unittest-matrix (exporter-2)	12s
windows-unittest-matrix (exporter-3)	3s
windows-unittest-matrix (extension)	2s
windows-unittest-matrix (connector)	7s
windows-unittest-matrix (internal)	7s
windows-unittest-matrix (pkg)	6s
windows-unittest-matrix (cmd-0)	7s
windows-unittest-matrix (cmd-1)	6s
windows-unittest-matrix (other)	7s
windows-unittest	1s
	1m 39s

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