coverage: ignore lcov errors temporarily #194

Job	Run time
spelling	5s
validate commits	0s
Generate build matrix	8s
python linting	33s
bookworm - test-install	1m 44s
bookworm - 32 bit	1m 31s
noble - test-install	1m 54s
el9 - test-install	1m 32s
fedora40 - test-install	1m 41s
alpine - test-install	1m 25s
jammy - test-install	1m 25s
focal - py3.8	1m 29s
bookworm - gcc-12,content-s3,distcheck	1m 53s
fedora40 - clang-18	1m 30s
coverage	1m 38s
el8 - ascii	1m 29s
el8 - system,coverage	1m 38s
inception	1m 29s
flux-sched check	1m 18s
flux-pmix check	1m 27s
flux-accounting check	1m 33s
flux-pam check	1m 28s
Generate docker manifest	0s
	28m 50s

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