ci/piglit: remove xfail program@build@include-directories

Now that build-piglit.sh is no longer removing ‘include_test.h’ this test program@build@include-directories is passing which is causing jobs to fail due to this unexpected improvement. Remove this test from expected fails so that the jobs can pass.

See !31549 (merged)

Some examples: https://gitlab.freedesktop.org/dbrouwer/mesa/-/jobs/64975373 https://gitlab.freedesktop.org/dbrouwer/mesa/-/jobs/64974504 https://gitlab.freedesktop.org/dbrouwer/mesa/-/jobs/64974044

@dh @sergi @eric