Replace jaeger agent by otlp exporter

[javiermolinar]

The Jaeger agent was deprecated some time ago. Two weeks ago, the code was removed from Jaeger

https://github.com/jaegertracing/jaeger/pull/6868

Currently, we use it in two places:

Tempo vulture

Integration tests util

The otlp exporter can replace it

https://github.com/grafana/tempo/blob/4c489a4e94c22312330ea68349753eee12832684/integration/util/util.go#L360

[iamrajiv]

@javiermolinar, I’d like to work on this task and would appreciate your confirmation. We need to update the tests as well, correct? Specifically, we should replace utils.NewJaegerGRPCClient with utils.NewOtlpJaegerClient, right?

[javiermolinar]

@javiermolinar, I’d like to work on this task and would appreciate your confirmation. We need to update the tests as well, correct? Specifically, we should replace utils.NewJaegerGRPCClient with utils.NewOtlpJaegerClient, right?

You are correct, thank you for submitting a PR, I'll review it next week

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