Wizard: add/rm firstboot service based on state

[avitova]

I noticed there is a bug that does not show a relevant list of services that we create on user's behalf.

How to reproduce:

1. start creating a blueprint with a first boot script
2. go to the review step - the custom-first-boot service is not displayed there, but we are adding it on user's behalf
3. click on "Edit blueprint"
4. go to First boot step and remove the script
5. go to the review step - the custom-first-boot service is displayed there, but we will remove it after clicking "edit"

Overall, I thought that the code in requestMapper was a bit unclear, and I needed to do something similar for the Satellite follow-up, so I was digging deeper, and found a small bug.
Let me know what you think. I tried to prevent the code from removing/adding service in case we just edit an existing script.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.84%. Comparing base (048baff) to head (e581718).
Report is 1 commits behind head on main.

@@            Coverage Diff             @@
##             main    #2983      +/-   ##
==========================================
- Coverage   81.85%   81.84%   -0.01%     
==========================================
  Files         210      210              
  Lines       23621    23614       -7     
  Branches     2335     2332       -3     
==========================================
- Hits        19334    19327       -7     
  Misses       4258     4258              
  Partials       29       29              

Files with missing lines	Coverage Δ
...onents/CreateImageWizard/steps/FirstBoot/index.tsx	94.52% <100.00%> (+0.49%)	⬆️
...nents/CreateImageWizard/utilities/requestMapper.ts	94.86% <100.00%> (-0.11%)	⬇️

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[regexowl]

This works beautifully. Thank you for cleaning up the code ❤️