meson: Support for both packaging and distutils

meson: Support for both packaging and distutils

distutils was deprecated and is now gone on modern systems.
so the default behavior is to use the supported thing, which is packaging.version, and when on an old system, fallback to the old distutils.version.

Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/9943

Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
Reviewed-by: Eric Engestrom <eric@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26746>
(cherry picked from commit 670a799ebff9a98daafccf49324c2a01311b0c41)