feat: add oauth2client OTel extensions to builder config (#433)

Co-authored-by: Korbinian Stoemmer <[email protected]>

Author: TeodorSAP

otel-collector/builder-config.yaml

@@ -48,6 +48,7 @@ extensions:
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/extension/pprofextension vOTEL_CONTRIB_VERSION
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/extension/storage/filestorage vOTEL_CONTRIB_VERSION
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/extension/k8sleaderelector vOTEL_CONTRIB_VERSION
+  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/extension/oauth2clientauthextension vOTEL_CONTRIB_VERSION
 
 connectors:
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/connector/routingconnector vOTEL_CONTRIB_VERSION