pvr: ci: Initial freedesktop CI integration

This patch adds the PowerVR driver to the following shared builds:

 * debian-arm64
 * debian-clang
 * debian-release
 * debian-vulkan
 * fedora-release

It also adds the associated "tools" to these builds:

 * debian-arm64-build-test
 * debian-release (already uses -Dtools=all)
 * fedora-release

And removes them from these builds by expanding -Dtools=all:

 * debian-gallium

Signed-off-by: Matt Coster <matt.coster@imgtec.com>
Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <!15284>
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