Add env command to ansible-test and run in CI. (#50176)

* Add `env` command to ansible-test and run in CI.
* Avoid unnecessary docker pull.

test/runner/lib/util.py

@@ -737,10 +737,13 @@ class MissingEnvironmentVariable(ApplicationError):
 
 class CommonConfig(object):
     """Configuration common to all commands."""
-    def __init__(self, args):
+    def __init__(self, args, command):
         """
         :type args: any
+        :type command: str
         """
+        self.command = command
+
         self.color = args.color  # type: bool
         self.explain = args.explain  # type: bool
         self.verbosity = args.verbosity  # type: int