* repomirror: Use skopeo list-tags to get repo tags
`skopeo inspect foo` returns infromation about the image `foo:latest`,
and repository tags. Quay needs only list of tags, so it should use
`skopeo list-tags` that doesn't fail if `foo:latest` doesn't exist.
* Update type hints
* On local-dev Quay does not provide valid TLS certificate
* Update peewee types
Also remove tools/sharedimagestorage.py as it doesn't work anymore.
tools/sharedimagestorage.py:3: error: "ModelSelect[ImageStorage]" has no attribute "annotate"
* Remove endpoints/api/test/test_security.py from exclude list
* Format storage/test/test_azure.py
Currently the CI breaks due to a dependency of black, `click`, breaking with it's latest release with `ImportError: cannot import name '_unicodefun' from 'click'`. Since black does not pin it's version of click it pulls in the latest version containing the breaking change and fails the CI check. This updates black with the patch. [See the original issue here.](https://github.com/psf/black/issues/2964) The rest of the changes are format updates introduced with the latest version of black.
introduces the possibility to pull images from external registries
through Quay, storing them locally for faster subsequent pulls.
Closes PROJQUAY-3030 and PROJQUAY-3033
* Add dev dependencies mypy and typing
* Add makefile target `types-test`, not yet included in `test` target.
* Generate stubs for imported modules to avoid mypy complaining about missing types.
* Remove generated stubs as there are way too many and they cause tons of mess in the repo. Switched to ignoring untyped modules for now, to concentrate on Quay-only type checking.
* mypy config changed to ignore missing imports
* ignore property decorator as it is not supported by mypy
* mypy annotations for many configuration variables
* re-generate mypy_stubs directory as its necessary in some classes for base classes to prevent mypy errors
* util/registry/queuefile referred to non existent definition of Empty class in multiprocessing.queues
* ignore type checking for things like monkey patching and exported/re-imported objects that
mypy does not allow.
* Adjust mypy config to warn us about unreachable return paths and useless expressions.
* Add the __annotations__ property to INTERNAL_ONLY_PROPERTIES so that it is not part of the config schema testing
* Remove redundant dependencies `typing` and `typing-extensions` which are NOOP after Python 3.5
* Remove mypy-extensions which only provides a TypedDict implementation but has not been updated since 2019.
* updated mypy to 0.910 which requires all types packages to be installed manually.
* exclude local-dev from type checking until core team can suggest an outcome for __init__.py duplicate packages
* re-add typing dependency which will be needed until Python 3.9
* ignore .mypy_cache
* add mypy stub for features module to replace inline definitions
* import annotations eager evaluation in billing.py as it was required to reference a class declared later in the module.
* remove the type definition of V1ProtocolSteps/V2ProtocolSteps to make tox happy
