[python] Explicitly bind HTTP server to localhost (#8880)

On Windows, Python 3 is unable to listen on `0.0.0.0` and errors with:

```
[WinError 10049] The requested address is not valid in its context
```

The only solution I found is to bind to `127.0.0.1` or `localhost`. I've run into issues before with using `localhost`, so I chose to go with `127.0.0.1` and Windows (and macOS) seems to be happy.

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packages/python/vc_init.py

@@ -4,6 +4,7 @@ import json
 import inspect
 from importlib import util
 from http.server import BaseHTTPRequestHandler
+import socket
 
 # Import relative path https://docs.python.org/3/library/importlib.html#importing-a-source-file-directly
 __vc_spec = util.spec_from_file_location("__VC_HANDLER_MODULE_NAME", "./__VC_HANDLER_ENTRYPOINT")
@@ -37,7 +38,7 @@ if 'handler' in __vc_variables or 'Handler' in __vc_variables:
     import http
     import _thread
 
-    server = HTTPServer(('', 0), base)
+    server = HTTPServer(('127.0.0.1', 0), base)
     port = server.server_address[1]
 
     def vc_handler(event, context):
@@ -57,8 +58,11 @@ if 'handler' in __vc_variables or 'Handler' in __vc_variables:
             body = base64.b64decode(body)
 
         request_body = body.encode('utf-8') if isinstance(body, str) else body
-        conn = http.client.HTTPConnection('0.0.0.0', port)
-        conn.request(method, path, headers=headers, body=request_body)
+        conn = http.client.HTTPConnection('127.0.0.1', port)
+        try:
+            conn.request(method, path, headers=headers, body=request_body)
+        except (http.client.HTTPException, socket.error) as ex:
+            print ("Request Error: %s" % ex)
         res = conn.getresponse()
 
         return_dict = {