ci/x86: Remove meson from apt when we later install it with pip

But install Ninja, which is needed.

Reviewed-by: Yonggang Luo <luoyonggang@gmail.com>
Signed-off-by: David Heidelberg <david.heidelberg@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19863>

.gitlab-ci/container/debian/x86_build-base.sh

@@ -59,7 +59,7 @@ apt-get install -y --no-remove \
         libxshmfence-dev \
         libxxf86vm-dev \
         make \
-        meson \
+        ninja-build \
         pkg-config \
         python3-mako \
         python3-pil \