[pkg/ottl] Add GetXML Converter (#35462) #3

Job	Run time
windows-unittest-matrix (receiver-0)	12m 18s
windows-unittest-matrix (receiver-1)	17m 44s
windows-unittest-matrix (receiver-2)	16m 12s
windows-unittest-matrix (receiver-3)	16m 31s
windows-unittest-matrix (processor-0)	9m 6s
windows-unittest-matrix (processor-1)	10m 56s
windows-unittest-matrix (exporter-0)	10m 15s
windows-unittest-matrix (exporter-1)	21m 1s
windows-unittest-matrix (exporter-2)	9m 22s
windows-unittest-matrix (exporter-3)	11m 50s
windows-unittest-matrix (extension)	11m 27s
windows-unittest-matrix (connector)	10m 31s
windows-unittest-matrix (internal)	14m 32s
windows-unittest-matrix (pkg)	9m 22s
windows-unittest-matrix (cmd-0)	3m 3s
windows-unittest-matrix (cmd-1)	12m 2s
windows-unittest-matrix (other)	13m 45s
windows-unittest	4s
	3h 30m 1s

Provide feedback