improve: deprecate LifecycleAware

This is used across many components, but as an abstraction itself
not referenced anyware. So it is rather confusing, since does not say
anything about the class that implements it.

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

Author: csviri

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

@@ -17,6 +17,7 @@
 
 import io.javaoperatorsdk.operator.OperatorException;
 
+@Deprecated(forRemoval = true)
 public interface LifecycleAware {
   void start() throws OperatorException;