[ISSUE-1076] Fixing return error code for SearchPartName

[Andrzej-Zukowski]

Purpose

Resolves #1077

Fix for error code returned in case of partition UUID not present on block device

PR checklist

• Add link to the issue
• Choose Project
• Choose PR label
• New unit tests added
• Modified code has meaningful comments
• All TODOs are linked with the issues
• All comments are resolved

Testing

Provide test details

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (f45d675) 72.76% compared to head (e1a9a9f) 72.84%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1079      +/-   ##
==========================================
+ Coverage   72.76%   72.84%   +0.07%     
==========================================
  Files          63       63              
  Lines        8949     8949              
==========================================
+ Hits         6512     6519       +7     
+ Misses       2147     2142       -5     
+ Partials      290      288       -2     

Flag	Coverage Δ
unittests	72.84% <100.00%> (+0.07%)	⬆️

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[libzhang]

the change looks good to me.