Add messagingReceiveInstrumentationEnabled configuration to Kafka autoconfigure

The Kafka instrumentation autoconfiguration was missing the ability to configure
messagingReceiveInstrumentationEnabled from the property
'otel.instrumentation.messaging.experimental.receive-telemetry.enabled'.

This is required to control creation of separate spans in Spring Boot
autoconfiguration for Kafka consumers.

Changes:
- Added setMessagingReceiveInstrumentationEnabled() call in KafkaInstrumentationAutoConfiguration
- Uses the standard property 'otel.instrumentation.messaging.experimental.receive-telemetry.enabled'
- Follows the same pattern as other messaging instrumentations (JMS, Pulsar, etc.)

Fixes the missing configuration that was preventing proper control of Kafka
consumer span creation in Spring Boot applications.

Author: Arunodoy18

instrumentation/spring/spring-boot-autoconfigure/src/main/java/io/opentelemetry/instrumentation/spring/autoconfigure/internal/instrumentation/kafka/KafkaInstrumentationAutoConfiguration.java

@@ -43,11 +43,12 @@ DefaultKafkaProducerFactoryCustomizer otelKafkaProducerFactoryCustomizer(
   static SpringKafkaTelemetry getTelemetry(
       ObjectProvider<OpenTelemetry> openTelemetryProvider,
       ObjectProvider<InstrumentationConfig> configProvider) {
+    InstrumentationConfig config = configProvider.getObject();
     return SpringKafkaTelemetry.builder(openTelemetryProvider.getObject())
         .setCaptureExperimentalSpanAttributes(
-            configProvider
-                .getObject()
-                .getBoolean("otel.instrumentation.kafka.experimental-span-attributes", false))
+            config.getBoolean("otel.instrumentation.kafka.experimental-span-attributes", false))
+        .setMessagingReceiveInstrumentationEnabled(
+            config.getBoolean("otel.instrumentation.messaging.experimental.receive-telemetry.enabled", false))
         .build();
   }