Ignore flaky opentelemetry-jaeger tests (#1529) #4181

Job	Run time
docs	6m 25s
external-types (opentelemetry)	1m 8s
coverage	8m 48s
external-types (opentelemetry-sdk)	1m 20s
cargo-deny	27s
lint	20m 5s
msrv	4m 27s
non-default-examples (opentelemetry-otlp/examples/external-otlp-grpcio-async-std)	4m 50s
test (stable)	17m 43s
non-default-examples (opentelemetry-otlp/examples/basic-otlp)	45s
test (beta)	15m 57s
	1h 21m 55s

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