Set Executor attributes in super class constructor

Setting these attributes in the constructor makes reasoning about later use
less complicated.  If an Executor is instantiated these exist.  Whether or not
they've been set to a non-default value is another question.

parsl/dataflow/dflow.py

@@ -1140,8 +1140,6 @@ def add_executors(self, executors: Sequence[ParslExecutor]) -> None:
             executor.hub_port = self.hub_zmq_port
             if self.monitoring:
                 executor.monitoring_radio = self.monitoring.radio
-            else:
-                executor.monitoring_radio = None
             if hasattr(executor, 'provider'):
                 if hasattr(executor.provider, 'script_dir'):
                     executor.provider.script_dir = os.path.join(self.run_dir, 'submit_scripts')

parsl/executors/base.py

@@ -1,3 +1,4 @@
+import os
 from abc import ABCMeta, abstractmethod
 from concurrent.futures import Future
 from typing import Any, Callable, Dict, Optional
@@ -45,6 +46,21 @@ class ParslExecutor(metaclass=ABCMeta):
     label: str = "undefined"
     radio_mode: str = "udp"
 
+    def __init__(
+        self,
+        *,
+        hub_address: Optional[str] = None,
+        hub_port: Optional[int] = None,
+        monitoring_radio: Optional[MonitoringRadio] = None,
+        run_dir: str = ".",
+        run_id: Optional[str] = None,
+    ):
+        self.hub_address = hub_address
+        self.hub_port = hub_port
+        self.monitoring_radio = monitoring_radio
+        self.run_dir = os.path.abspath(run_dir)
+        self.run_id = run_id
+
     def __enter__(self) -> Self:
         return self