Pyctuator

Pyctuator now supports disabling specific endpoints such as "environments".
This is done by specifying the endpoints to be disabled as follows:
python
pyctuator = Pyctuator(
app,
"Example FastAPI",
app_url=f"http://{example_app_address}:8000",
pyctuator_endpoint_url=f"http://{example_app_address}:8000/pyctuator",
registration_url=f"http://{example_sba_address}:8080/instances",
app_description=app.description,
disabled_endpoints=Endpoints.ENV | Endpoints.HTTP_TRACE
)

* Upgrade many of the dependencies to much newer version
* Fix github workflow to use newer ubuntu runner
* Support multiple DB connections by naming respective health-provider and composing them

Upgrade dependencies recommended by `pyctuator show -o`.

In this major release we've finally upgraded Python to 3.9 and libraries to a recent versions, see 81.

In addition:
* This release improves the HTTP status code returned from the "health" endpoint, see 79.
* For maintainers - Major improvement to E2E's stability by using distinct TCP port for each test.

See https://github.com/SolarEdgeTech/pyctuator/tree/master/examples/Advanced#secret-scrubbing for details.

See 67