Add more sleep to weak gauge test
MODIFY
instrumentation/micrometer/micrometer-1.5/testing/src/main/java/io/opentelemetry/instrumentation/micrometer/v1_5/AbstractGaugeTest.java
instrumentation/micrometer/micrometer-1.5/testing/src/main/java/io/opentelemetry/instrumentation/micrometer/v1_5/AbstractGaugeTest.java
@@ -138,6 +138,7 @@ public abstract class AbstractGaugeTest {
GcUtils.awaitGc(numWeakRef);
// then
+ Thread.sleep(100); // interval of the test metrics exporter
testing().clearData();
Thread.sleep(100); // interval of the test metrics exporter
testing()

Add more sleep to weak gauge test (#5350)