run epilog even if job prolog fails or is canceled #9464

Job	Run time
python linting	29s
Generate build matrix	6s
validate commits	10s
spelling	5s
bookworm - test-install	12m 0s
bookworm - 32 bit	13m 8s
noble - test-install	12m 46s
el9 - test-install	13m 11s
alpine - test-install	12m 33s
fedora40 - test-install	12m 31s
jammy - test-install	11m 53s
focal - py3.8	17m 14s
bookworm - gcc-12,content-s3,distcheck	19m 44s
fedora40 - clang-18	16m 52s
coverage	24m 10s
el8 - ascii	19m 26s
el8 - system,coverage	7m 36s
inception	22m 23s
flux-pmix check	12m 47s
flux-accounting check	4m 33s
flux-sched check	6m 55s
flux-pam check	3m 51s
Generate docker manifest	1s
	4h 4m 24s

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