Fix missing throw statement in RestClientWrapper (#11892) (#11893)

Author: kyy1996

instrumentation/elasticsearch/elasticsearch-rest-7.0/library/src/main/java/io/opentelemetry/instrumentation/elasticsearch/rest/v7_0/RestClientWrapper.java

@@ -74,6 +74,7 @@ private static Class<?> createProxyClass() {
                       response = (Response) method.invoke(target, args);
                     } catch (Throwable exception) {
                       throwable = exception;
+                      throw throwable;
                     } finally {
                       instrumenter.end(context, otelRequest, response, throwable);
                     }
@@ -102,6 +103,7 @@ private static Class<?> createProxyClass() {
                       return method.invoke(target, args);
                     } catch (Throwable exception) {
                       throwable = exception;
+                      throw throwable;
                     } finally {
                       if (throwable != null) {
                         instrumenter.end(context, otelRequest, null, throwable);