fix(deps): update module go.opentelemetry.io/collector/consumer/consumertest to v0.121.0

Author: renovate[bot]

go.mod

@@ -9,7 +9,7 @@ require (
 	go.opentelemetry.io/collector/component/componenttest v0.115.0
 	go.opentelemetry.io/collector/config/confighttp v0.115.0
 	go.opentelemetry.io/collector/consumer v1.21.0
-	go.opentelemetry.io/collector/consumer/consumertest v0.115.0
+	go.opentelemetry.io/collector/consumer/consumertest v0.121.0
 	go.opentelemetry.io/collector/pdata v1.21.0
 	go.opentelemetry.io/collector/receiver v0.115.0
 	go.opentelemetry.io/collector/receiver/receivertest v0.115.0