feat: add --environment flag to sqlmesh janitor for scoped cleanup #3694

Job	Run time
test-dbt-versions (1.4)	1m 40s
test-dbt-versions (1.3)	1m 41s
test-dbt-versions (1.7)	1m 50s
test-dbt-versions (1.8)	1m 46s
test-dbt-versions (1.5)	1m 29s
changes	5s
test-dbt-versions (1.9)	1m 49s
test-dbt-versions (1.6)	1m 33s
test-dbt-versions (1.10)	1m 39s
test-vscode-e2e	-1s
test-vscode	-1s
migration-test	1m 29s
style-and-cicd-tests (3.9)	23m 36s
style-and-cicd-tests (3.12)	22m 45s
cicd-tests-windows	9m 52s
style-and-cicd-tests (3.13)	22m 11s
style-and-cicd-tests (3.10)	23m 33s
style-and-cicd-tests (3.11)	23m 19s
doc-tests	29s
engine-tests-docker (duckdb)	1m 40s
engine-tests-docker (spark)	5m 49s
engine-tests-docker (risingwave)	2m 45s
engine-tests-docker (mssql)	1m 55s
engine-tests-docker (postgres)	3m 30s
engine-tests-docker (trino)	8m 28s
engine-tests-docker (mysql)	1m 37s
engine-tests-docker (clickhouse)	2m 47s
ui-style	0s
ui-test	0s
engine-tests-cloud	-1s
	2h 49m 14s

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