[Bug testsuite/125160] python is not documented as an optional feature for running the testsuite

[sjames at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125160

--- Comment #1 from Sam James <sjames at gcc dot gnu.org> ---
A lot more than that. Tests for: analyzer, libgdiagnostics, sarif, gcov, some
plugins (and some plugin tests actually use CPython headers too)