Add --raw option to ansible-test shell command.

It is currently supported only with the `--remote` option.

This makes it easier to troubleshoot new instances which are not
yet supported by the setup scripts used by ansible-test.

test/runner/lib/executor.py

@@ -161,6 +161,10 @@ def install_command_requirements(args, python_version=None):
     :type args: EnvironmentConfig
     :type python_version: str | None
     """
+    if isinstance(args, ShellConfig):
+        if args.raw:
+            return
+
     generate_egg_info(args)
 
     if not args.requirements: