In current Mesa versions, typically these are pulled in via explicit
linking that generates a `DT_NEEDED` ELF header, either in individual
DRI drivers in very old Mesa, in the Gallium "megadriver" in
intermediate Mesa versions like the one in Debian 12, or in
`libgallium-${VERSION}.so` in newer Mesa.

However, Mesa merge request
https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21658


suggests demoting the dependency on `libdrm_amdgpu.so.1` from
`DT_NEEDED` to `dlopen()`. Changing that dependency from declarative to
imperative breaks our ability to follow it, resulting in the container's
older `libdrm_amdgpu.so.1` being used.

In principle there's nothing to stop the same thing from happening for
any of the libraries in the libdrm family, so look for all of them.
For future-proofing, I've included all available drivers even if they
are not available on x86 (but excluding exynos and omap, which seem to
be only for 32-bit ARM hardware, which is probably no longer
interesting).

Tested-by: Dmitry Osipenko
Signed-off-by: Simon McVittie <smcv@collabora.com>