Use config.combined.yaml as the default collector config for combined layers

[bardabun]

This PR adds a new production-ready configuration, collector/config.combined.yaml, and updates all combined layer build scripts to install it as the default /opt/collector-config/config.yaml.

This change avoids the build failure caused by the deprecated service.telemetry.metrics.address key in the old default config. It ensures that the combined layers work out-of-the-box without requiring users to set the OPENTELEMETRY_COLLECTOR_CONFIG_URI environment variable.

Changes

• Added collector/config.combined.yaml.
• Updated the following build scripts to prefer the new config as the default:
  • java/build-combined.sh
  • python/src/build-combined.sh
  • nodejs/packages/layer/build-combined.sh
  • ruby/build-combined.sh
  • go/build-combined.sh

Behavior

If collector/config.combined.yaml exists, it is copied to collector-config/config.yaml within the layer. Otherwise, the existing collector/config.yaml is used as a fallback.

Notes

• The default config path used by the collector remains /opt/collector-config/config.yaml.
• Users can still override this default by setting OPENTELEMETRY_COLLECTOR_CONFIG_URI if needed.

[ralongit]

💯