Add containsEntry overload that accepts int (#3412)

docs/apidiffs/current_vs_latest/opentelemetry-sdk-testing.txt

@@ -1,4 +1,7 @@
 Comparing source compatibility of  against 
+***  MODIFIED CLASS: PUBLIC FINAL io.opentelemetry.sdk.testing.assertj.AttributesAssert  (not serializable)
+	===  CLASS FILE FORMAT VERSION: 52.0 <- 52.0
+	+++  NEW METHOD: PUBLIC(+) io.opentelemetry.sdk.testing.assertj.AttributesAssert containsEntry(io.opentelemetry.api.common.AttributeKey, int)
 ***  MODIFIED CLASS: PUBLIC FINAL io.opentelemetry.sdk.testing.assertj.SpanDataAssert  (not serializable)
 	===  CLASS FILE FORMAT VERSION: 52.0 <- 52.0
 	+++  NEW METHOD: PUBLIC(+) io.opentelemetry.sdk.testing.assertj.SpanDataAssert hasException(java.lang.Throwable)

sdk/testing/src/main/java/io/opentelemetry/sdk/testing/assertj/AttributesAssert.java

@@ -38,6 +38,11 @@ public final class AttributesAssert extends AbstractAssert<AttributesAssert, Att
     return this;
   }
 
+  /** Asserts the attributes have the given key and value. */
+  public AttributesAssert containsEntry(AttributeKey<Long> key, int value) {
+    return containsEntry(key, (long) value);
+  }
+
   /** Asserts the attributes have the given key and string value. */
   public AttributesAssert containsEntry(String key, String value) {
     return containsEntry(AttributeKey.stringKey(key), value);

sdk/testing/src/test/java/io/opentelemetry/sdk/testing/assertj/OpenTelemetryAssertionsTest.java

@@ -146,6 +146,8 @@ class OpenTelemetryAssertionsTest {
                     .containsEntry("bear", "mya")
                     .containsEntry("warm", true)
                     .containsEntry("temperature", 30)
+                    .containsEntry(AttributeKey.longKey("temperature"), 30L)
+                    .containsEntry(AttributeKey.longKey("temperature"), 30)
                     .containsEntry("length", 1.2)
                     .containsEntry("colors", "red", "blue")
                     .containsEntryWithStringValuesOf("colors", Arrays.asList("red", "blue"))