feat(janitor): add scoped snapshot cleanup for invalidated environments #3895

Job	Run time
changes	8s
test-dbt-versions (1.6)	1m 53s
test-dbt-versions (1.7)	1m 46s
test-dbt-versions (1.5)	1m 30s
test-dbt-versions (1.8)	1m 42s
test-dbt-versions (1.9)	1m 40s
test-dbt-versions (1.3)	1m 43s
test-dbt-versions (1.4)	1m 31s
test-dbt-versions (1.10)	1m 47s
test-vscode	0s
test-vscode-e2e	-8s
cicd-tests-windows	10m 4s
doc-tests	36s
style-and-cicd-tests (3.10)	2m 28s
style-and-cicd-tests (3.13)	3m 28s
migration-test	1m 34s
style-and-cicd-tests (3.9)	2m 53s
style-and-cicd-tests (3.12)	2m 51s
style-and-cicd-tests (3.11)	3m 11s
engine-tests-docker (mssql)	2m 10s
engine-tests-docker (postgres)	2m 12s
engine-tests-docker (clickhouse)	2m 29s
engine-tests-docker (spark)	5m 5s
engine-tests-docker (mysql)	1m 37s
engine-tests-docker (duckdb)	1m 35s
engine-tests-docker (trino)	8m 35s
engine-tests-docker (risingwave)	2m 45s
engine-tests-docker (starrocks)	2m 36s
ui-test	0s
ui-style	0s
engine-tests-cloud	0s
	1h 9m 41s

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