feat: add missing core OTel Collector extensions to builder-config.yaml

Add memorylimiterextension and zpagesextension from the upstream
opentelemetry-collector core distribution. These were the only core
components missing from our builder manifest.

Refs: HDX-4029

Author: wrn14897

.changeset/otel-collector-add-core-extensions.md

@@ -0,0 +1,9 @@
+---
+'@hyperdx/otel-collector': minor
+---
+
+feat: Add missing core OTel Collector extensions (memorylimiterextension, zpagesextension)
+
+Include the two core extensions from the upstream opentelemetry-collector that
+were not previously listed in builder-config.yaml. This ensures users can use
+zpages and the memory limiter extension in their custom OTel configs.

packages/otel-collector/builder-config.yaml

@@ -83,6 +83,13 @@ connectors:
       v__OTEL_COLLECTOR_VERSION__
 
 extensions:
+  # Core
+  - gomod:
+      go.opentelemetry.io/collector/extension/memorylimiterextension
+      v__OTEL_COLLECTOR_VERSION__
+  - gomod:
+      go.opentelemetry.io/collector/extension/zpagesextension
+      v__OTEL_COLLECTOR_VERSION__
   # Contrib
   - gomod:
       github.com/open-telemetry/opentelemetry-collector-contrib/extension/bearertokenauthextension