[3.12] gh-103186: In test_tools.freeze, fetch CONFIG_ARGS from original source directory (GH-103213) (#106667)

gh-103186: In test_tools.freeze, fetch CONFIG_ARGS from original source directory (GH-103213)

Fetch CONFIG_ARGS from the original source directory, instead of from
the copied source tree. When "make clean" is executed in the copied
source tree, the build directory is cleared and the configure argument
lookup fails. However, the original source directory still contains this
information.
(cherry picked from commit de827322ca47e51d52ff44536a7c3fd44648383a)

Co-authored-by: Ijtaba Hussain <ijtabahussain@live.com>