fix: use version-agnostic Metrics import instead of versioned package

Import from the superclass (io.prometheus.metrics.expositionformats.generated.Metrics)
so that protobuf version bumps don't require updating imports in test files.
Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>

Author: zeitlinger

integration-tests/it-common/src/test/java/io/prometheus/client/it/common/ExporterTest.java

@@ -4,7 +4,7 @@
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.fail;
 
-import io.prometheus.metrics.expositionformats.generated.com_google_protobuf_4_34_0.Metrics;
+import io.prometheus.metrics.expositionformats.generated.Metrics;
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.io.InputStream;

integration-tests/it-exporter/it-exporter-test/src/test/java/io/prometheus/metrics/it/exporter/test/DuplicateMetricsIT.java

@@ -3,7 +3,7 @@
 import static org.assertj.core.api.Assertions.assertThat;
 
 import io.prometheus.client.it.common.ExporterTest;
-import io.prometheus.metrics.expositionformats.generated.com_google_protobuf_4_34_0.Metrics;
+import io.prometheus.metrics.expositionformats.generated.Metrics;
 import java.io.IOException;
 import java.net.URISyntaxException;
 import java.util.List;

integration-tests/it-exporter/it-exporter-test/src/test/java/io/prometheus/metrics/it/exporter/test/ExporterIT.java

@@ -5,7 +5,7 @@
 
 import com.google.common.io.Resources;
 import io.prometheus.client.it.common.ExporterTest;
-import io.prometheus.metrics.expositionformats.generated.com_google_protobuf_4_34_0.Metrics;
+import io.prometheus.metrics.expositionformats.generated.Metrics;
 import java.io.IOException;
 import java.net.URISyntaxException;
 import java.net.URLEncoder;

integration-tests/it-spring-boot-smoke-test/src/test/java/io/prometheus/metrics/it/springboot/ApplicationTest.java

@@ -3,7 +3,7 @@
 import static org.assertj.core.api.Assertions.assertThat;
 
 import io.prometheus.client.it.common.ExporterTest;
-import io.prometheus.metrics.expositionformats.generated.com_google_protobuf_4_34_0.Metrics;
+import io.prometheus.metrics.expositionformats.generated.Metrics;
 import java.io.IOException;
 import java.net.URI;
 import java.util.List;

prometheus-metrics-core/src/test/java/io/prometheus/metrics/core/metrics/CounterTest.java

@@ -9,7 +9,7 @@
 import io.prometheus.metrics.config.MetricsProperties;
 import io.prometheus.metrics.config.PrometheusProperties;
 import io.prometheus.metrics.core.exemplars.ExemplarSamplerConfigTestUtil;
-import io.prometheus.metrics.expositionformats.generated.com_google_protobuf_4_34_0.Metrics;
+import io.prometheus.metrics.expositionformats.generated.Metrics;
 import io.prometheus.metrics.expositionformats.internal.PrometheusProtobufWriterImpl;
 import io.prometheus.metrics.expositionformats.internal.ProtobufUtil;
 import io.prometheus.metrics.model.registry.PrometheusRegistry;

prometheus-metrics-core/src/test/java/io/prometheus/metrics/core/metrics/CustomBucketsHistogramTest.java

@@ -5,7 +5,7 @@
 
 import io.prometheus.metrics.config.EscapingScheme;
 import io.prometheus.metrics.expositionformats.OpenMetricsTextFormatWriter;
-import io.prometheus.metrics.expositionformats.generated.com_google_protobuf_4_34_0.Metrics;
+import io.prometheus.metrics.expositionformats.generated.Metrics;
 import io.prometheus.metrics.expositionformats.internal.PrometheusProtobufWriterImpl;
 import io.prometheus.metrics.model.snapshots.ClassicHistogramBucket;
 import io.prometheus.metrics.model.snapshots.ClassicHistogramBuckets;

prometheus-metrics-core/src/test/java/io/prometheus/metrics/core/metrics/HistogramTest.java

@@ -13,7 +13,7 @@
 import io.prometheus.metrics.core.datapoints.DistributionDataPoint;
 import io.prometheus.metrics.core.exemplars.ExemplarSamplerConfigTestUtil;
 import io.prometheus.metrics.expositionformats.OpenMetricsTextFormatWriter;
-import io.prometheus.metrics.expositionformats.generated.com_google_protobuf_4_34_0.Metrics;
+import io.prometheus.metrics.expositionformats.generated.Metrics;
 import io.prometheus.metrics.expositionformats.internal.PrometheusProtobufWriterImpl;
 import io.prometheus.metrics.expositionformats.internal.ProtobufUtil;
 import io.prometheus.metrics.model.snapshots.*;

prometheus-metrics-core/src/test/java/io/prometheus/metrics/core/metrics/InfoTest.java

@@ -5,7 +5,7 @@
 
 import io.prometheus.metrics.config.EscapingScheme;
 import io.prometheus.metrics.expositionformats.OpenMetricsTextFormatWriter;
-import io.prometheus.metrics.expositionformats.generated.com_google_protobuf_4_34_0.Metrics;
+import io.prometheus.metrics.expositionformats.generated.Metrics;
 import io.prometheus.metrics.expositionformats.internal.PrometheusProtobufWriterImpl;
 import io.prometheus.metrics.expositionformats.internal.ProtobufUtil;
 import io.prometheus.metrics.model.snapshots.Labels;