OCM-7256 | feat: Move non-cmd funcs to pkg, split, test

[hunterkepley]

OCM-7256 Has the following definition of done:

Functions have been moved to new machine pool package
Functions test coverage is at least 70%

The 70% test coverage may not be there yet, as one function requires a runner to be tested. This will be done ALONG WITH the rework in the next ticket: https://issues.redhat.com/browse/OCM-7257

This MR splits the list function up where possible, along with combining machine and node pool funcs into a single function as they have quite a bit of shared code and there's no reason to separate.

[hunterkepley]

/test coverage

[codecov]

Codecov Report

Attention: Patch coverage is 59.37500% with 26 lines in your changes are missing coverage. Please review.

Project coverage is 24.23%. Comparing base (59e94e8) to head (640be58).
Report is 66 commits behind head on master.

Files	Patch %	Lines
pkg/machinepool/machinepool.go	59.37%	26 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1964      +/-   ##
==========================================
+ Coverage   23.22%   24.23%   +1.01%     
==========================================
  Files         136      138       +2     
  Lines       21160    21859     +699     
==========================================
+ Hits         4914     5298     +384     
- Misses      15879    16160     +281     
- Partials      367      401      +34     

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[chenz4027]

/lgtm

[ciaranRoche]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chenz4027, ciaranRoche, hunterkepley

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[openshift-ci]

@hunterkepley: all tests passed!

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