Revert "ci: disable unit tests"

As we disabled the glsl tests by meson options always, so
we reverts commit 4dd8c143.

Closes #6897

Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
231 jobs for !17928 with misc-fixes-for-unittest in 8 seconds (queued for 19 seconds)
merge request