testsuite: fixes for Lassen #7797

Job	Run time
validate commits	10s
python linting	37s
spelling	7s
Generate build matrix	10s
bookworm	29m 9s
bookworm - 32 bit	13m 19s
bookworm - gcc-12,content-s3,distcheck	14m 24s
bookworm - py3.11,clang-15	31m 43s
coverage	24m 5s
jammy - test-install	9m 51s
bookworm - test-install	10m 2s
focal - py3.8	12m 49s
el8	29m 2s
el8 - ascii	32m 36s
el8 - system,coverage	10m 27s
fedora34 - gcc-11.2,py3.9	13m 4s
fedora38 - gcc-13.1,py3.11	12m 13s
inception	15m 39s
flux-accounting check	4m 4s
flux-sched check	5m 52s
flux-pam check	3m 48s
flux-pmix check	19m 30s
Generate docker manifest	0s
	4h 52m 41s

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