chore: spack-v0.22.1

Includes some git CVE fixes, https://github.blog/2024-05-14-securing-git-addressing-5-new-vulnerabilities/, as well as non-package-related fixes to spack itself, full list at https://github.com/spack/spack/releases/tag/v0.22.1 (several affect us, some requested by us).

containers/debian/base.Dockerfile

-#syntax=docker/dockerfile:1.4
+#syntax=docker/dockerfile:1.8
+#check
 ARG BASE_IMAGE="amd64/debian:stable-slim"
 ARG BUILD_IMAGE="debian_stable_base"