[pkg/ottl] Add client metadata access to OTTL contexts #55475

Job	Run time
setup-environment	2m 0s
arm-unittest-matrix (receiver-3)	5m 49s
arm-unittest-matrix (receiver-0)	6m 49s
arm-unittest-matrix (receiver-2)	5m 15s
arm-unittest-matrix (processor-1)	4m 28s
arm-unittest-matrix (exporter-0)	3m 22s
arm-unittest-matrix (exporter-1)	9m 7s
arm-unittest-matrix (extension)	6m 27s
arm-unittest-matrix (processor-0)	3m 49s
arm-unittest-matrix (cmd-0)	2m 50s
arm-unittest-matrix (internal)	9m 10s
arm-unittest-matrix (exporter-3)	5m 14s
arm-unittest-matrix (exporter-2)	3m 59s
arm-unittest-matrix (connector)	4m 12s
arm-unittest-matrix (other)	4m 59s
arm-unittest-matrix (pkg)	5m 12s
arm-unittest-matrix (receiver-1)	7m 7s
arm-unittest	3s
flakytests-generate-issues	-1s
	1h 29m 51s

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