[serdes] allow entity ids in targets (#45290)

...ise/backend/src/metabase_enterprise/serialization/api.clj

...kend/src/metabase_enterprise/serialization/v2/extract.clj

...ckend/test/metabase_enterprise/serialization/api_test.clj

...est/metabase_enterprise/serialization/v2/extract_test.clj

src/metabase/cmd.clj

src/metabase/models/serialization.clj

test/metabase/cmd_test.clj