docs - generate environment variables (#41802)

...src/metabase_enterprise/sso/integrations/sso_settings.clj

src/metabase/cmd/env_var_dox.clj

src/metabase/cmd/resources/other-env-vars.md

src/metabase/driver/sql_jdbc/connection.clj

src/metabase/public_settings.clj

src/metabase/public_settings/premium_features.clj

src/metabase/server/middleware/session.clj

test/metabase/cmd/env_var_dox_test.clj