add --port parameter for interactive learning (#5837)

* fixrd a bug

* Run Black code formatter

* used add_server_arguments to get the port from cmd instead

* to remove unwanted print statement

* Revert "used add_server_arguments to get the port from cmd instead"

This reverts commit cf6ec6f.

* used add_server_argument to get the port from cmd for interactive

* Update rasa/core/training/interactive.py

Co-authored-by: Tobias Wochinger <mail@tobias-wochinger.de>

* added changelog2

* added port argument

* fixed tests

Co-authored-by: Padma Nandhini <padmanandhini@gmail.com>
Co-authored-by: Tobias Wochinger <mail@tobias-wochinger.de>

test_rasa_interactive.py

@@ -13,7 +13,7 @@
 def test_interactive_help(run: Callable[..., RunResult]):
     output = run("interactive", "--help")
 
-    help_text = """usage: rasa interactive [-h] [-v] [-vv] [--quiet] [--e2e] [-m MODEL]
+    help_text = """usage: rasa interactive [-h] [-v] [-vv] [--quiet] [--e2e] [-p PORT] [-m MODEL]
                         [--data DATA [DATA ...]] [--skip-visualization]
                         [--conversation-id CONVERSATION_ID]
                         [--endpoints ENDPOINTS] [-c CONFIG] [-d DOMAIN]
@@ -35,7 +35,7 @@ def test_interactive_core_help(run: Callable[..., RunResult]):
                              [--conversation-id CONVERSATION_ID]
                              [--endpoints ENDPOINTS] [-c CONFIG] [-d DOMAIN]
                              [--out OUT] [--augmentation AUGMENTATION]
-                             [--debug-plots]
+                             [--debug-plots] [-p PORT]
                              [model-as-positional-argument]"""
 
     lines = help_text.split("\n")
@@ -182,7 +182,9 @@ def test_pass_conversation_id_to_interactive_learning(monkeypatch: MonkeyPatch):
 
     do_interactive_learning(args, Mock())
 
-    _serve_application.assert_called_once_with(ANY, ANY, True, expected_conversation_id)
+    _serve_application.assert_called_once_with(
+        ANY, ANY, True, expected_conversation_id, 5005
+    )
 
 
 def test_generate_conversation_id_for_interactive_learning(monkeypatch: MonkeyPatch):