Apache Airflow 2.2.3

## Bug Fixes - Lazy Jinja2 context (#20217) - Exclude ``snowflake-sqlalchemy`` v1.2.5 (#20245) - Move away from legacy ``importlib.resources`` API (#19091) - Move setgid as the first command executed in forked task runner (#20040) - Fix race condition when starting ``DagProcessorAgent`` (#19935) - Limit ``httpx`` to <0.20.0 (#20218) - Log provider import errors as debug warnings (#20172) - Bump minimum required ``alembic`` version (#20153) - Fix log link in gantt view (#20121) - fixing #19028 by moving chown to use sudo (#20114) - Lift off upper bound for ``MarkupSafe`` (#20113) - Fix infinite recursion on redact log (#20039) - Fix db downgrades (#19994) - Context class handles deprecation (#19886) - Fix possible reference to undeclared variable (#19933) - Validate ``DagRun`` state is valid on assignment (#19898) - Workaround occasional deadlocks with MSSQL (#19856) - Enable task run setting to be able reinitialise (#19845) - Fix log endpoint for same task (#19672) - Cast macro datetime string inputs explicitly (#19592) - Do not crash with stacktrace when task instance is missing (#19478) - Fix log timezone in task log view (#19342) (#19401) - Fix: Add taskgroup tooltip to graph view (#19083) - Rename execution date in forms and tables (#19063) - Simplify "invalid TI state" message (#19029) - Handle case of nonexistent file when preparing file path queue (#18998) - Do not create dagruns for DAGs with import errors (#19367) - Fix field relabeling when switching between conn types (#19411) - ``KubernetesExecutor`` should default to template image if used (#19484) - Fix task instance api cannot list task instances with ``None`` state (#19487) - Fix IntegrityError in ``DagFileProcessor.manage_slas`` (#19553) - Declare data interval fields as serializable (#19616) - Relax timetable class validation (#19878) - Fix labels used to find queued ``KubernetesExecutor`` pods (#19904) - Fix moved data migration check for MySQL when replcation is used (#19999) ## Doc only changes - Warn without tracebacks when example_dags are missing deps (#20295) - Deferrable operators doc clarification (#20150) - Ensure the example DAGs are all working (#19355) - Updating core example DAGs to use TaskFlow API where applicable (#18562) - Add xcom clearing behaviour on task retries (#19968) - Add a short chapter focusing on adapting secret format for connections (#19859) - Add information about supported OS-es for Apache Airflow (#19855) - Update docs to reflect that changes to the ``base_log_folder`` require updating other configs (#19793) - Disclaimer in ``KubernetesExecutor`` pod template docs (#19686) - Add upgrade note on ``execution_date`` -> ``run_id`` (#19593) - Expanding ``.output`` operator property information in TaskFlow tutorial doc (#19214) - Add example SLA DAG (#19563) - Add a proper example to patch DAG (#19465) - Add DAG file processing description to Scheduler Concepts (#18954) - Updating explicit arg example in TaskFlow API tutorial doc (#18907) - Adds back documentation about context usage in Python/`@task` (#18868) - Add release date for when an endpoint/field is added in the REST API (#19203) - Better ``pod_template_file`` examples (#19691) - Add decription on how you can customize image entrypoint (#18915) - Dags-in-image pod template example should not have dag mounts (#19337)