Merge pull request #9308 from metabase/snowflake-fix-connection-validation

docs/developers-guide.md

modules/drivers/presto/src/metabase/driver/presto.clj

modules/drivers/snowflake/src/metabase/driver/snowflake.clj

...drivers/snowflake/test/metabase/driver/snowflake_test.clj

modules/drivers/vertica/src/metabase/driver/vertica.clj

project.clj

src/metabase/core.clj

src/metabase/driver/sql_jdbc/connection.clj

src/metabase/driver/util.clj

src/metabase/events.clj

src/metabase/events/sync_database.clj

src/metabase/metabot/slack.clj

src/metabase/metabot/websocket.clj

src/metabase/task/follow_up_emails.clj

src/metabase/task/send_anonymous_stats.clj

src/metabase/task/upgrade_checks.clj