support duration update for running jobs #7743

Job	Run time
Generate build matrix	8s
python linting	58s
validate commits	17s
spelling	8s
bookworm	27m 18s
bookworm - 32 bit	28m 51s
bookworm - gcc-12,content-s3,distcheck	32m 54s
bookworm - py3.11,clang-15	23m 46s
coverage	36m 43s
jammy - test-install	22m 4s
bookworm - test-install	21m 59s
focal - py3.8	24m 30s
el8	28m 48s
el8 - ascii	34m 13s
el8 - system,coverage	11m 8s
fedora34 - gcc-11.2,py3.9	30m 28s
fedora38 - gcc-13.1,py3.11	22m 3s
inception	29m 52s
flux-pmix check	16m 51s
flux-pam check	6m 5s
flux-sched check	10m 6s
flux-accounting check	5m 8s
Generate docker manifest	1s
	6h 54m 19s

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