coverage: ignore lcov errors temporarily #193

Job	Run time
python linting	30s
validate commits	0s
Generate build matrix	8s
spelling	6s
bookworm - test-install	1m 33s
bookworm - 32 bit	1m 40s
noble - test-install	1m 53s
el9 - test-install	1m 48s
fedora40 - test-install	1m 35s
alpine - test-install	1m 15s
jammy - test-install	1m 25s
focal - py3.8	1m 22s
bookworm - gcc-12,content-s3,distcheck	1m 54s
fedora40 - clang-18	1m 30s
coverage	1m 42s
el8 - ascii	1m 37s
el8 - system,coverage	1m 44s
inception	1m 22s
flux-sched check	1m 28s
flux-pmix check	1m 34s
flux-pam check	1m 28s
flux-accounting check	1m 32s
Generate docker manifest	0s
	29m 6s

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