The `meson configure` command is used in `.gitlab-ci/meson/build.sh` to
show a summary of the build configuration, however when the script is
re-used locally on systems when there is a pager the commands blocks
for user input, which can be annoying.
Pass the `--no-pager` option to `meson configure`, so that it never
blocks for user input.
This does not change the behavior in the CI, it just makes the script run
uninterrupted also on local invocations.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34289>
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