Fix: Make the janitor best effort #3629

Job	Run time
changes	7s
test-dbt-versions (1.3)	1m 40s
test-dbt-versions (1.5)	1m 54s
test-dbt-versions (1.7)	1m 41s
test-dbt-versions (1.8)	1m 37s
test-dbt-versions (1.10)	1m 44s
test-dbt-versions (1.6)	1m 38s
test-dbt-versions (1.9)	1m 44s
test-dbt-versions (1.4)	1m 41s
test-vscode-e2e	0s
test-vscode	0s
migration-test	1m 30s
cicd-tests-windows	12m 57s
style-and-cicd-tests (3.11)	23m 41s
style-and-cicd-tests (3.10)	22m 23s
style-and-cicd-tests (3.13)	20m 35s
style-and-cicd-tests (3.12)	24m 10s
engine-tests-docker (postgres)	2m 24s
engine-tests-docker (duckdb)	1m 40s
engine-tests-docker (trino)	8m 13s
style-and-cicd-tests (3.9)	22m 9s
engine-tests-docker (mssql)	1m 47s
doc-tests	31s
engine-tests-docker (clickhouse)	2m 56s
engine-tests-docker (risingwave)	2m 42s
engine-tests-docker (spark)	5m 10s
engine-tests-docker (mysql)	1m 41s
ui-style	-1s
ui-test	-1s
engine-tests-cloud	0s
	2h 48m 13s

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