feat(janitor): add scoped snapshot cleanup for invalidated environments #3953

Job	Run time
changes	8s
test-dbt-versions (1.6)	1m 46s
test-dbt-versions (1.7)	1m 53s
test-dbt-versions (1.9)	1m 56s
test-dbt-versions (1.3)	1m 58s
test-dbt-versions (1.4)	1m 34s
test-dbt-versions (1.10)	1m 44s
test-dbt-versions (1.5)	1m 32s
test-dbt-versions (1.8)	1m 32s
test-vscode-e2e	-10s
test-vscode	-11s
cicd-tests-windows	10m 29s
migration-test	1m 28s
doc-tests	34s
style-and-cicd-tests (3.13)	22m 23s
style-and-cicd-tests (3.10)	18m 12s
style-and-cicd-tests (3.9)	23m 55s
style-and-cicd-tests (3.12)	22m 0s
style-and-cicd-tests (3.11)	24m 33s
engine-tests-docker (duckdb)	1m 38s
engine-tests-docker (mysql)	1m 50s
engine-tests-docker (trino)	7m 40s
engine-tests-docker (mssql)	2m 5s
engine-tests-docker (postgres)	2m 18s
engine-tests-docker (risingwave)	2m 40s
engine-tests-docker (spark)	5m 19s
engine-tests-docker (clickhouse)	2m 36s
engine-tests-docker (starrocks)	2m 33s
ui-test	0s
ui-style	0s
engine-tests-cloud	0s
	2h 45m 55s

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