feat(janitor): add scoped snapshot cleanup for invalidated environments #3809

Job	Run time
changes	6s
test-dbt-versions (1.6)	54s
test-dbt-versions (1.4)	53s
test-dbt-versions (1.8)	53s
test-dbt-versions (1.7)	55s
test-dbt-versions (1.10)	54s
test-dbt-versions (1.5)	54s
test-dbt-versions (1.9)	54s
test-dbt-versions (1.3)	53s
test-vscode	0s
test-vscode-e2e	-7s
doc-tests	27s
ui-test	34s
cicd-tests-windows	38s
migration-test	47s
style-and-cicd-tests (3.10)	40s
style-and-cicd-tests (3.12)	34s
style-and-cicd-tests (3.13)	35s
style-and-cicd-tests (3.9)	44s
style-and-cicd-tests (3.11)	41s
engine-tests-docker (trino)	47s
engine-tests-docker (postgres)	46s
engine-tests-docker (mysql)	46s
engine-tests-docker (starrocks)	33s
engine-tests-docker (risingwave)	33s
engine-tests-docker (mssql)	5s
engine-tests-docker (duckdb)	33s
engine-tests-docker (spark)	33s
engine-tests-docker (clickhouse)	33s
ui-style	0s
engine-tests-cloud	1s
	17m 59s

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