feat(janitor): add scoped snapshot cleanup for invalidated environments #3896

Job	Run time
test-dbt-versions (1.3)	1m 46s
test-dbt-versions (1.7)	1m 47s
changes	6s
test-dbt-versions (1.4)	1m 48s
test-dbt-versions (1.6)	1m 43s
test-dbt-versions (1.5)	1m 37s
test-dbt-versions (1.9)	1m 51s
test-dbt-versions (1.8)	1m 36s
test-dbt-versions (1.10)	1m 53s
test-vscode	-1s
doc-tests	32s
cicd-tests-windows	11m 23s
style-and-cicd-tests (3.12)	26m 46s
style-and-cicd-tests (3.10)	24m 4s
style-and-cicd-tests (3.11)	23m 31s
style-and-cicd-tests (3.9)	19m 31s
engine-tests-docker (mysql)	1m 32s
engine-tests-docker (trino)	7m 58s
engine-tests-docker (postgres)	2m 57s
engine-tests-docker (spark)	5m 38s
engine-tests-docker (risingwave)	3m 38s
engine-tests-docker (clickhouse)	2m 51s
engine-tests-docker (duckdb)	1m 31s
style-and-cicd-tests (3.13)	23m 12s
engine-tests-docker (mssql)	1m 51s
engine-tests-docker (starrocks)	2m 34s
migration-test	1m 31s
ui-test	0s
ui-style	0s
test-vscode-e2e	-10s
engine-tests-cloud	0s
	2h 54m 56s

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