Fix inventory plugin cache + add tests (#38229)

* Fix setting the cache when refresh_cache or --flush-cache are used

* Use jsonify function that handles datetime objects in jsonfile cache plugin

* Don't access self._options directly

* Add initial integration tests for aws_ec2 inventory plugin

* Add CI alias

* Fix and add a few more unit tests

* Add integration tests for constructed

* Fix typo

* Use inventory config templates

* Collect all instances that are not terminated by default

* Create separate playbook for setting up the VPC, subnet, security group, and finding an image for the host

Create a separate playbook for removing the resources

* Allow easier grouping by region and add an example

* use a unified json encode/decode that can handle unsafe and vault

lib/ansible/plugins/cache/jsonfile.py

@@ -49,7 +49,7 @@ try:
 except ImportError:
     import json
 
-from ansible.parsing.utils.jsonify import jsonify
+from ansible.parsing.ajson import AnsibleJSONEncoder, AnsibleJSONDecoder
 from ansible.plugins.cache import BaseFileCacheModule
 
 
@@ -61,8 +61,8 @@ class CacheModule(BaseFileCacheModule):
     def _load(self, filepath):
         # Valid JSON is always UTF-8 encoded.
         with codecs.open(filepath, 'r', encoding='utf-8') as f:
-            return json.load(f)
+            return json.load(f, cls=AnsibleJSONDecoder)
 
     def _dump(self, value, filepath):
         with codecs.open(filepath, 'w', encoding='utf-8') as f:
-            f.write(jsonify(value, format=True))
+            f.write(json.dumps(value, cls=AnsibleJSONEncoder, sort_keys=True, indent=4))