Bump go.opentelemetry.io/collector/pdata from 1.19.0 to 1.20.0 #6006

Job	Run time
build-auto-instrumentation	1m 17s
kubernetes-test (v1.26.0, autosdk)	3m 9s
kubernetes-test (v1.26.0, nethttp)	2m 32s
kubernetes-test (v1.26.0, nethttp_custom)	2m 47s
kubernetes-test (v1.26.0, gin)	3m 11s
kubernetes-test (v1.26.0, databasesql)	3m 22s
kubernetes-test (v1.26.0, grpc)	2m 59s
kubernetes-test (v1.26.0, otelglobal)	2m 52s
kubernetes-test (v1.26.0, kafka-go)	2m 20s
	24m 29s

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