improve: add setMaxInterval(Duration) for GenericRetry (#3297)

Signed-off-by: Attila Mészáros <a_meszaros@apple.com>

Author: csviri

operator-framework-core/src/main/java/io/javaoperatorsdk/operator/processing/retry/GenericRetry.java

@@ -90,6 +90,10 @@ public GenericRetry setMaxInterval(long maxInterval) {
     return this;
   }
 
+  public GenericRetry setMaxInterval(Duration maxInterval) {
+    return setMaxInterval(maxInterval.toMillis());
+  }
+
   public GenericRetry withoutMaxInterval() {
     this.maxInterval = -1;
     return this;