fix(backport): Pass script_runner commands as a single sequence

[matthewfeickert]

Description

Backport PR #2221

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• Tests are passing
• "WIP" removed from the title of the pull request
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* Backport PR https://github.com/scikit-hep/pyhf/pull/2221
* Require pytest-console-scripts v1.4.0+ in 'test' extra. pytest-console-scripts v1.4.0
  introduces a DeprecationWarning:
  > script_runner commands should be passed as a single sequence, not as multiple arguments.
  > Replace `script_runner.run(a, b, c)` calls with `script_runner.run([a, b, c])`
* Remove unpacking of the command to be passed to script_runner with shlex.split
  to pass a list and not multiple arguments.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (release/v0.7.x@b35b863). Click here to learn what that means.
Patch has no changes to coverable lines.

Additional details and impacted files

@@                Coverage Diff                @@
##             release/v0.7.x    #2222   +/-   ##
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  Coverage                  ?   98.30%           
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  Files                     ?       69           
  Lines                     ?     4532           
  Branches                  ?      802           
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  Hits                      ?     4455           
  Misses                    ?       45           
  Partials                  ?       32           

Flag	Coverage Δ
contrib	27.51% <0.00%> (?)
doctest	61.07% <0.00%> (?)
unittests-3.10	96.31% <0.00%> (?)
unittests-3.11	96.31% <0.00%> (?)
unittests-3.7	96.29% <0.00%> (?)
unittests-3.8	96.33% <0.00%> (?)
unittests-3.9	96.35% <0.00%> (?)

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