[MergeDups] Extract protected-reasons-text functions

[imnasnainaec]

Prequel to #3445

Screenshots to demonstrate that the protected reasons are still showing:

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This change is 

[codecov]

Codecov Report

Attention: Patch coverage is 2.12766% with 46 lines in your changes missing coverage. Please review.

Project coverage is 74.62%. Comparing base (a7a0b33) to head (af3508d).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...ergeDuplicates/MergeDupsStep/protectReasonUtils.ts	2.22%	44 Missing ⚠️
...uplicates/MergeDupsStep/MergeDragDrop/DropWord.tsx	0.00%	1 Missing ⚠️
...MergeDuplicates/MergeDupsStep/SenseCardContent.tsx	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3489      +/-   ##
==========================================
- Coverage   74.67%   74.62%   -0.05%     
==========================================
  Files         285      286       +1     
  Lines       10995    11001       +6     
  Branches     1337     1338       +1     
==========================================
- Hits         8211     8210       -1     
- Misses       2401     2408       +7     
  Partials      383      383              

Flag	Coverage Δ
backend	83.62% <ø> (ø)
frontend	66.63% <2.12%> (-0.09%)	⬇️

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[andracc]

Reviewed 3 of 3 files at r2, 1 of 1 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @imnasnainaec)