Replace openshift client with kubernetes client

[gravesm]

SUMMARY

This commit primarily just removes mentions of openshift from the docs
and updates the requirements. Most of the work to replace the client has
been done through the following commits:

edc48ee
c214376
48c5170
2b6a989

Closes #34.

ISSUE TYPE

• Bugfix Pull Request

COMPONENT NAME

ADDITIONAL INFORMATION

[codecov]

Codecov Report

Merging #96 (19d991a) into main (2b6a989) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #96   +/-   ##
=======================================
  Coverage   24.02%   24.02%           
=======================================
  Files           1        1           
  Lines         154      154           
  Branches       29       29           
=======================================
  Hits           37       37           
- Misses        111      112    +1     
+ Partials        6        5    -1     

Impacted Files	Coverage Δ
...ections/kubernetes/core/plugins/action/k8s_info.py	24.02% <0.00%> (ø)

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