[aws] ec2_metadata_facts URL encode the metadata URL to avoid errors (#43394)

- If a field in the URL has a space it would result in a 400 without making it URL safe
- Fixes #42371 and #43378

(cherry picked from commit 4ce09ea62d)

lib/ansible/modules/cloud/amazon/ec2_metadata_facts.py

@@ -423,7 +423,7 @@ import time
 from ansible.module_utils.basic import AnsibleModule
 from ansible.module_utils._text import to_text
 from ansible.module_utils.urls import fetch_url
-
+from ansible.module_utils.six.moves.urllib.parse import quote
 
 socket.setdefaulttimeout(5)
 
@@ -444,13 +444,14 @@ class Ec2Metadata(object):
         self._prefix = 'ansible_ec2_%s'
 
     def _fetch(self, url):
-        response, info = fetch_url(self.module, url, force=True)
+        encoded_url = quote(url, safe='%/:=&?~#+!$,;\'@()*[]')
+        response, info = fetch_url(self.module, encoded_url, force=True)
 
         if info.get('status') not in (200, 404):
             time.sleep(3)
             # request went bad, retry once then raise
             self.module.warn('Retrying query to metadata service. First attempt failed: {0}'.format(info['msg']))
-            response, info = fetch_url(self.module, url, force=True)
+            response, info = fetch_url(self.module, encoded_url, force=True)
             if info.get('status') not in (200, 404):
                 # fail out now
                 self.module.fail_json(msg='Failed to retrieve metadata from AWS: {0}'.format(info['msg']), response=info)