Core: Rename cleanUpOnCommitFailure to cleanUp and make it protected (apache#15389)

Author: deniskuzZ

core/src/main/java/org/apache/iceberg/BaseTransaction.java

@@ -376,11 +376,11 @@ private void commitSimpleTransaction() {
       throw e;
 
     } catch (PendingUpdateFailedException e) {
-      cleanUpOnCommitFailure();
+      cleanUp();
       throw e.wrapped();
     } catch (RuntimeException e) {
       if (!ops.requireStrictCleanup() || e instanceof CleanableFailure) {
-        cleanUpOnCommitFailure();
+        cleanUp();
       }
 
       throw e;
@@ -417,7 +417,7 @@ private void commitSimpleTransaction() {
     }
   }
 
-  private void cleanUpOnCommitFailure() {
+  protected void cleanUp() {
     // the commit failed and no files were committed. clean up each update.
     cleanAllUpdates();