Implement functions for manipulating join strategies (#31181)

frontend/src/metabase-lib/join.ts

frontend/src/metabase-lib/types.ts

frontend/src/metabase-lib/v2.ts

src/metabase/lib/core.cljc

src/metabase/lib/join.cljc

src/metabase/lib/js.cljs

src/metabase/lib/metadata.cljc

src/metabase/lib/schema/join.cljc

test/metabase/lib/join_test.cljc

test/metabase/lib/metadata_test.cljc

test/metabase/lib/test_metadata.cljc

test/metabase/lib/test_util.cljc