Revert "[confignet] Mark as stable" (#11115)

Reverts #9801

To unblock the release of the collector-contrib, will re-land after.

Author: bogdandrutu

.chloggen/confignet-mark-stable.yaml

@@ -15,7 +15,6 @@ module-sets:
       - go.opentelemetry.io/collector/config/configcompression
       - go.opentelemetry.io/collector/config/configretry
       - go.opentelemetry.io/collector/config/configtls
-      - go.opentelemetry.io/collector/config/confignet
   beta:
     version: v0.109.0
     modules:
@@ -33,6 +32,7 @@ module-sets:
       - go.opentelemetry.io/collector/config/configauth
       - go.opentelemetry.io/collector/config/configgrpc
       - go.opentelemetry.io/collector/config/confighttp
+      - go.opentelemetry.io/collector/config/confignet
       - go.opentelemetry.io/collector/config/configtelemetry
       - go.opentelemetry.io/collector/config/internal
       - go.opentelemetry.io/collector/connector