simplify the signature of ProtoFromTraces as it never returns an erro… #91216

Job	Run time
windows-unittest-matrix (receiver-0)	7m 39s
windows-unittest-matrix (receiver-1)	12m 34s
windows-unittest-matrix (receiver-2)	11m 20s
windows-unittest-matrix (receiver-3)	11m 36s
windows-unittest-matrix (processor-0)	5m 15s
windows-unittest-matrix (processor-1)	8m 18s
windows-unittest-matrix (exporter-0)	6m 56s
windows-unittest-matrix (exporter-1)	15m 9s
windows-unittest-matrix (exporter-2)	10m 17s
windows-unittest-matrix (exporter-3)	8m 0s
windows-unittest-matrix (extension)	9m 16s
windows-unittest-matrix (connector)	4m 56s
windows-unittest-matrix (internal)	10m 27s
windows-unittest-matrix (pkg)	5m 25s
windows-unittest-matrix (cmd-0)	4m 10s
windows-unittest-matrix (cmd-1)	3m 33s
windows-unittest-matrix (other)	7m 6s
windows-unittest	0s
	2h 21m 57s

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