Ert

**Bugixes:**
Revert "EE and launching ert-storage use same code for finding open port"

**Enhancements:**
- Batch all event types
- Use 127.0.0.1 as url while binding to 0.0.0.0
- EE and launching ert-storage use same code for finding open port
- Order real status according to state transitions
- Update detailed progress after failure (1658)
- ert3: Ensure immutable stages config
- ert3: Use public interface when testing ensemble config
- ert3: Ensure immutable ensemble config
- ert3: Ensure immutable experiment config
- ert3: Introduce parameters config
- ert3: Make distributions expose their arguments

**Bug fixes:**
- Fix bug in prefect ensemble error handling
- Fix retry connection in evaluator tracker
- Fix rounding error in realization progress visualisation
- ert3: Fix wrongly typed distribution index

**Bugfixes:**
- Add timeout when waiting for cancelled dispatchers

**Enhancements:**

- Add batching of events in ensemble evaluator
- Log evaluator cross talk
- Remove ensemble evaluator feature flag warning
- Use `phaseCount` in progress calculation, drop phase
- Timeout CI pipeline after 30 mins
- Refactor evaluator utils
- Refactor `update_step` to refer to step entities
- Refactor and extend testing of PartialSnapshot
- Remove size cap on ensemble evaluator msg queue
- Add 'ensemble_size' as param to 'post_ensemble_data'
- Add record class 'response' to extracted responses
- Add test to make sure total progress is updated
- Keep tracker iteration snapshot up to date
- Use ERT Storage's TestClient
- Improve cancellation of ensembles

**Bugfixes:**
- Use isoformat for timestamps when converting to str
- Pass `ee_id` to `execute_queue_async`
- Fix running event loop in gui sim thread
- Fix cancelling of ensemble hanging for ever
- Handle dns operation timeout

**Dependendencies:**
- Set lower bound for `pytest`
- Depend on `dnspython>=2` and `pydantic>=1.8.1`

**New features:**
- Add support for Python 3.9
- Enable ensemble evaluator by default

**Enhancements:**
- Add classifiers to setup.py
- Upgrade to websockets 9
- Fix usage of .closed in socket code
- Cleanup prefect ensemble test for function defined outside the python environment
- Add logging to development strategy
- ERT 3: Feature/step type class
- Use the prefect context to pass url,token and certification info
- Add type hinting to make mypy pass on ert3 in strict mode
- Force x_axis values to be strings before json serialization
- Extract priors to new storage

**Bug fixes:**
- Re-add `stderr` and `stdout` info
- Re-enable retries for Tasks

**Enhancements:**
- Add certificates and tokens to websocket communication