test: test hostname step on cockpit

[croissanne]

Needed some mocks and minor tweaks, overall not too drastic of a change.

[regexowl]

/retest

[codecov]

Codecov Report

Attention: Patch coverage is 46.15385% with 21 lines in your changes missing coverage. Please review.

Project coverage is 82.14%. Comparing base (73afbc2) to head (2e8de1a).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
src/test/mocks/cockpit/cockpitFile.ts	28.57%	10 Missing ⚠️
...t/Components/CreateImageWizard/wizardTestUtils.tsx	73.68%	5 Missing ⚠️
src/test/mocks/cockpit/index.ts	0.00%	3 Missing ⚠️
src/test/mocks/os-release/index.ts	0.00%	2 Missing ⚠️
src/Utilities/useGetEnvironment.ts	0.00%	1 Missing ⚠️

@@            Coverage Diff             @@
##             main    #2861      +/-   ##
==========================================
- Coverage   82.16%   82.14%   -0.03%     
==========================================
  Files         207      207              
  Lines       23155    23181      +26     
  Branches     2270     2274       +4     
==========================================
+ Hits        19026    19042      +16     
- Misses       4102     4112      +10     
  Partials       27       27              

Files with missing lines	Coverage Δ
src/Utilities/useGetEnvironment.ts	50.00% <0.00%> (-1.43%)	⬇️
src/test/mocks/os-release/index.ts	12.50% <0.00%> (ø)
src/test/mocks/cockpit/index.ts	50.00% <0.00%> (-6.53%)	⬇️
...t/Components/CreateImageWizard/wizardTestUtils.tsx	96.06% <73.68%> (-2.70%)	⬇️
src/test/mocks/cockpit/cockpitFile.ts	18.18% <28.57%> (+7.92%)	⬆️

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