Massimiliano Culpo f961a11187 Update Dockerfiles and images for Spack v0.18.0 (#30216) ... This PR updates the list of images we build nightly, deprecating Ubuntu 16.04 and CentOS 8 and adding Ubuntu 20.04, Ubuntu 22.04 and CentOS Stream. It also removes a lot of duplication by generating the Dockerfiles during the CI workflow and uploading them as artifacts for later inspection or reuse.		2022-04-22 08:51:26 +02:00
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spack	Update Dockerfiles and images for Spack v0.18.0 (#30216)	2022-04-22 08:51:26 +02:00