[projmgr] Fix Bvendor handling (#995)

[grasci-arm]

Bvendor is an unrestricted string and must be handled accordingly.
It should not be confused with Dvendor that uses predefined values listed in Device Vendor Enum and may have alternate names remapping.

Address #1671

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.82%. Comparing base (6cdfdd7) to head (c399d55).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1680   +/-   ##
=======================================
  Coverage   63.81%   63.82%           
=======================================
  Files         162      162           
  Lines       31599    31599           
  Branches    19364    19364           
=======================================
+ Hits        20166    20167    +1     
  Misses       7530     7530           
+ Partials     3903     3902    -1     

Flag	Coverage Δ
projmgr-cov	80.67% <100.00%> (+<0.01%)	⬆️

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Files	Coverage Δ
tools/projmgr/src/ProjMgrWorker.cpp	87.01% <100.00%> (+0.03%)	⬆️

[github-actions]

Test Results

    3 files     18 suites   7m 31s ⏱️
  359 tests   359 ✅ 0 💤 0 ❌
1 077 runs  1 077 ✅ 0 💤 0 ❌

Results for commit c399d55.