Add checking available resources

[justcrafter]

Problem description
The "deprecated checker" now checks versions and resource availability based on a static file. But in kubernetes settings we can set the available API groups via config file. See example.

Proposed solution

1. check resource availability bases on API responses k8s
2. returns error if resource is not found in API
3. deprication checker should show warnings in logs only

[codecov-io]

Codecov Report

Merging #114 into master will increase coverage by 0.73%.
The diff coverage is 87.4%.

@@            Coverage Diff             @@
##           master     #114      +/-   ##
==========================================
+ Coverage   82.14%   82.88%   +0.73%     
==========================================
  Files          16       21       +5     
  Lines        1378     1525     +147     
==========================================
+ Hits         1132     1264     +132     
- Misses        246      261      +15

Impacted Files	Coverage Δ
.../k8s/availability_checker/test_resource_getters.py	100% <100%> (ø)
.../availability_checker/test_availability_checker.py	100% <100%> (ø)
k8s_handle/k8s/availability_checker/checker.py	100% <100%> (ø)
k8s_handle/k8s/availability_checker/__init__.py	100% <100%> (ø)
k8s_handle/exceptions.py	100% <100%> (ø)	⬆️
k8s_handle/k8s/api_extensions.py	38.46% <20%> (-11.54%)	⬇️
k8s_handle/__init__.py	44.75% <25%> (-0.9%)	⬇️
...andle/k8s/availability_checker/resource_getters.py	93.02% <93.02%> (ø)
... and 4 more

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[furiousassault]

LGTM

[rvadim]

What do you think about adding some documentation about this feature?

[rvadim]

LGTM

[furiousassault]

Seems ok.