Move scale_out_facade next to scale_out (#3550)

See PR #3530 which does this for status()

This is a buildup to some simplification and eventual
merge of scale_out and scale_out_facade in upcoming PRs.

This PR should not change any behaviour

Author: benclifford

parsl/executors/status_handling.py

@@ -174,6 +174,16 @@ def _filter_scale_in_ids(self, to_kill, killed):
         # Filters first iterable by bool values in second
         return list(compress(to_kill, killed))
 
+    def scale_out_facade(self, n: int) -> List[str]:
+        block_ids = self._scale_out(n)
+        if block_ids is not None:
+            new_status = {}
+            for block_id in block_ids:
+                new_status[block_id] = JobStatus(JobState.PENDING)
+            self.send_monitoring_info(new_status)
+            self._status.update(new_status)
+        return block_ids
+
     def _scale_out(self, blocks: int = 1) -> List[str]:
         """Scales out the number of blocks by "blocks"
         """
@@ -327,13 +337,3 @@ def scale_in_facade(self, n: int, max_idletime: Optional[float] = None) -> List[
                 del self._status[block_id]
             self.send_monitoring_info(new_status)
         return block_ids
-
-    def scale_out_facade(self, n: int) -> List[str]:
-        block_ids = self._scale_out(n)
-        if block_ids is not None:
-            new_status = {}
-            for block_id in block_ids:
-                new_status[block_id] = JobStatus(JobState.PENDING)
-            self.send_monitoring_info(new_status)
-            self._status.update(new_status)
-        return block_ids