Merge x.39.3 -> master (#16477)

docs/operations-guide/changing-session-expiration.md

docs/operations-guide/environment-variables.md

...nterprise/sandbox/models/permissions/delete_sandboxes.clj

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

...se/backend/src/metabase_enterprise/serialization/dump.clj

...se/backend/src/metabase_enterprise/serialization/load.clj

...e/backend/src/metabase_enterprise/serialization/names.clj

...ckend/src/metabase_enterprise/serialization/serialize.clj

...e/backend/src/metabase_enterprise/serialization/specs.clj

.../backend/src/metabase_enterprise/serialization/upsert.clj

...test/metabase_enterprise/sandbox/api/permissions_test.clj

...se/backend/test/metabase_enterprise/sandbox/test_util.clj

...kend/test/metabase_enterprise/serialization/load_test.clj

...end/test/metabase_enterprise/serialization/names_test.clj

...test/metabase_enterprise/serialization/serialize_test.clj

...kend/test/metabase_enterprise/serialization/test_util.clj

...nd/test/metabase_enterprise/serialization/upsert_test.clj

frontend/src/metabase-lib/lib/Dimension.js

.../metabase/admin/settings/components/SettingsBatchForm.jsx

frontend/src/metabase/auth/components/LdapAndEmailForm.jsx