Vendor dependencies

Let's see how I like this workflow.

vendor/cxx/tools/buck/prelude/tests/re_utils.bzl

@@ -0,0 +1,22 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under both the MIT license found in the
+# LICENSE-MIT file in the root directory of this source tree and the Apache
+# License, Version 2.0 found in the LICENSE-APACHE file in the root directory
+# of this source tree.
+
+def get_re_executor_from_props(re_props: [{str.type: str.type}, None]) -> ["command_executor_config_builder", None]:
+    """
+    Convert the `remote_execution` properties param into a `CommandExecutorConfig`
+    to use with test providers.
+    """
+
+    if re_props == None:
+        return None
+
+    return CommandExecutorConfig(
+        local_enabled = False,
+        remote_enabled = True,
+        remote_execution_properties = re_props,
+        remote_execution_use_case = "tpx-default",
+    )