Fix: Make the janitor best effort #3623

Job	Run time
test-dbt-versions (1.3)	1m 37s
changes	7s
test-dbt-versions (1.5)	1m 24s
test-dbt-versions (1.8)	1m 33s
test-dbt-versions (1.6)	1m 36s
test-dbt-versions (1.7)	1m 41s
test-dbt-versions (1.4)	1m 34s
test-dbt-versions (1.9)	1m 47s
test-dbt-versions (1.10)	1m 44s
test-vscode-e2e	0s
test-vscode	0s
migration-test	1m 32s
style-and-cicd-tests (3.13)	21m 33s
cicd-tests-windows	10m 51s
doc-tests	30s
style-and-cicd-tests (3.9)	23m 48s
style-and-cicd-tests (3.12)	23m 6s
engine-tests-docker (duckdb)	1m 29s
style-and-cicd-tests (3.10)	23m 48s
engine-tests-docker (mssql)	1m 57s
engine-tests-docker (clickhouse)	2m 33s
engine-tests-docker (spark)	4m 57s
style-and-cicd-tests (3.11)	23m 15s
engine-tests-docker (postgres)	2m 14s
engine-tests-docker (risingwave)	2m 33s
engine-tests-docker (trino)	7m 28s
engine-tests-docker (mysql)	1m 51s
ui-test	-1s
ui-style	-1s
engine-tests-cloud	0s
	2h 46m 26s

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