Properly create list of known options when detecting typos

[sarah-witt]

What does this PR do?

Properly create list of known options when validating typos
Fixes: #11211

Motivation

Redis tests were failing with:

tests/test_slowlog.py:56: in test_custom_slowlog
    dd_run_check(redis_check)
../datadog_checks_dev/datadog_checks/dev/plugin/pytest.py:219: in run_check
    raise Exception('\n'.join(exc_lines))
E   Exception: 
E   Traceback (most recent call last):
E     File "/home/vsts/work/1/s/datadog_checks_base/datadog_checks/base/checks/base.py", line 1041, in run
E       initialization()
E     File "/home/vsts/work/1/s/datadog_checks_base/datadog_checks/base/utils/tracing.py", line 77, in wrapper
E       return f(self, *args, **kwargs)
E     File "/home/vsts/work/1/s/datadog_checks_base/datadog_checks/base/checks/base.py", line 455, in load_configuration_models
E       self.log_typos_in_options(intg_instance_config, instance_config, 'instances')
E     File "/home/vsts/work/1/s/datadog_checks_base/datadog_checks/base/utils/tracing.py", line 77, in wrapper
E       return f(self, *args, **kwargs)
E     File "/home/vsts/work/1/s/datadog_checks_base/datadog_checks/base/checks/base.py", line 414, in log_typos_in_options
E       known_options = dict(models_config).keys()
E   TypeError: attribute of type 'tuple' is not callable

This was happening because redis had a config option named keys

Additional Notes

Also updated the tests to input classes instead of dictionaries to mirror the actual input better, as well as added more type hints in the function.

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• PR title must be written as a CHANGELOG entry (see why)
• Files changes must correspond to the primary purpose of the PR as described in the title (small unrelated changes should have their own PR)
• PR must have changelog/ and integration/ labels attached

[fanny-jiang]

Very cool!