chore: upgrade some CI images, reactivate sherlock and clean up some old files. #522

Job	Run time
Ubuntu (20.04, gcc 9.4.0, open-mpi 4.0.3)	48m 28s
Ubuntu (20.04, gcc 10.5.0, open-mpi 4.0.3) - github codespaces	43m 22s
Ubuntu (22.04, gcc 11.4.0, open-mpi 4.1.2)	43m 21s
Ubuntu (22.04, gcc 12.3.0, open-mpi 4.1.2)	52m 25s
Ubuntu (22.04, clang 15.0.7 + gcc 11.4.0, open-mpi 4.1.2)	47m 29s
Ubuntu (20.04, clang 10.0.0 + gcc 9.4.0, open-mpi 4.0.3, cuda-11.8.89)	54m 11s
Rockylinux (8, gcc 8.5, cuda 12.5)	2m 10s
Rockylinux (8, clang 17.0.6, cuda 12.5)	2m 27s
Sherlock CPU (centos 7.9.2009, gcc 10.1.0, open-mpi 4.1.2, openblas 0.3.10, zlib 1.2.11)	53m 29s
Sherlock GPU (centos 7.9.2009, gcc 10.1.0, open-mpi 4.1.2, cuda 12.4.0, openblas 0.3.10, zlib 1.2.11)	44m 7s
check_that_all_images_built	0s
	6h 31m 29s

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