Update OTel Collector dependency >= 0.56.0

[AlexanderWert]

OpenTelemetry Swift introduced in version 1.3 changes that require OTel Collector version >= 0.56.0.

As a consequence the iOS APM agent cannot update to OpenTelemetry Swift versions > 1.2.0 as long as we do not update the corresponding OTel collector dependency in the APM server. This can become a blocker for new features and important updates we depend on in OpenTelemetry Swift.

We need to update the go.opentelemetry.io/collector/* dependencies to the latest version (or at least something >= 0.56.0).

Since nearly every release on the OTel collector repository has breaking changes it's not clear whether an update of the collector dependencies would break some behavior for older OTel agents / OTLP intake formats. Some investigation and testing is needed for this.

[AlexanderWert]

@bryce-b Looks like current version of opentelemetry-swift does not work with the newest versions of the collector either:
open-telemetry/opentelemetry-swift#311

Could you please verify this / or test with collector 0.55.0, so that we know which version of the collector dependency we would need to update the APM server to?

Thanks!

[simitt]

@elastic/apm-server let's wait for @bryce-b investigation which collector version is reliable before updating.

[bryce-b]

I spun up the demo otel-collector in the opentelemetry-collector-contrib which runs v0.56.0 of the collector. I was able to successfully capture traces using the latest version of opentelemetry-swift (v1.1.4)

Screencap on a trace captured in zipkin.

[simitt]

Updated the description and title to reflect an update to 0.56.0.