[APM] APM's AWS Lambda UI to support OpenTelemetry agents

[AlexanderWert]

With #106552 APM provides a tailored UI for AWS Lambda services / functions.
However, this doesn't cover AWS Lambda functions instrumented with OpenTelemetry agents.
Once, the APM server provides corresponding mapping of OpenTelemetry attributes for serverless applications, the UI for OTel-based AWS Lambda functions should behave the same way as with Lambda functions instrumented with Elastic APM Agents.

For comparison refer to the initials AWS Lambda UI issue: #106552

Depends on:

• APM Server issue: Map OpenTelemetry AWS Lambda attributes to Elastic APM concepts apm-server#5456

[elasticmachine]

Pinging @elastic/apm-ui (Team:apm)