[chore] testbed: set otelcol.Factories.Telemetry (open-telemetry#43726)

#### Description

Update the tests to explicitly set otelcol.Factories.Telemetry. This
will soon be a required field.

#### Link to tracking issue

Relates to
open-telemetry/opentelemetry-collector#14003

#### Testing

Tests pass.

#### Documentation

N/A

Author: axw

testbed/go.mod

@@ -66,6 +66,7 @@ require (
 	go.opentelemetry.io/collector/receiver v1.44.1-0.20251021231522-c657d5d4e920
 	go.opentelemetry.io/collector/receiver/otlpreceiver v0.138.1-0.20251021231522-c657d5d4e920
 	go.opentelemetry.io/collector/receiver/receivertest v0.138.1-0.20251021231522-c657d5d4e920
+	go.opentelemetry.io/collector/service v0.138.1-0.20251021231522-c657d5d4e920
 	go.opentelemetry.io/otel v1.38.0
 	go.uber.org/goleak v1.3.0
 	go.uber.org/multierr v1.11.0
@@ -362,7 +363,6 @@ require (
 	go.opentelemetry.io/collector/receiver/receiverhelper v0.138.1-0.20251021231522-c657d5d4e920 // indirect
 	go.opentelemetry.io/collector/receiver/xreceiver v0.138.1-0.20251021231522-c657d5d4e920 // indirect
 	go.opentelemetry.io/collector/semconv v0.128.1-0.20250610090210-188191247685 // indirect
-	go.opentelemetry.io/collector/service v0.138.1-0.20251021231522-c657d5d4e920 // indirect
 	go.opentelemetry.io/collector/service/hostcapabilities v0.138.1-0.20251021231522-c657d5d4e920 // indirect
 	go.opentelemetry.io/contrib/bridges/otelzap v0.13.0 // indirect
 	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.63.0 // indirect

testbed/testbed/components.go

@@ -17,6 +17,7 @@ import (
 	"go.opentelemetry.io/collector/processor/memorylimiterprocessor"
 	"go.opentelemetry.io/collector/receiver"
 	"go.opentelemetry.io/collector/receiver/otlpreceiver"
+	"go.opentelemetry.io/collector/service/telemetry/otelconftelemetry"
 	"go.uber.org/multierr"
 
 	"github.com/open-telemetry/opentelemetry-collector-contrib/connector/routingconnector"
@@ -81,6 +82,7 @@ func Components() (
 		Processors: processors,
 		Exporters:  exporters,
 		Connectors: connectors,
+		Telemetry:  otelconftelemetry.NewFactory(),
 	}
 
 	return factories, errs