test_freeze_simple_script in test_tools fails to fetch CONFIG_ARGS

[erlend-aasland]

Tools/freeze/test/freeze.py fetches CONFIG_ARGS from the [clean] build directory, instead of fetching it from the source directory.

Discovered while working on #102131.

Linked PRs

• gh-102151: Correctly fetch CONFIG_ARGS in Tools/freeze/test/freeze.py #102152
• [3.11] gh-102151: Correctly fetch CONFIG_ARGS in Tools/freeze/test/freeze.py (GH-102152) #102176

[erlend-aasland]

May Also affect other platforms like *nix, but I've only tested this on macOS.

[erlend-aasland]

See also Ned's comment: #102070 (comment)