[projmgr] Update cbuild-idx also in case of early convert errors (#1425)

[grasci-arm]

Address #2374

[github-actions]

Test Results

    3 files     21 suites   14m 20s ⏱️
  450 tests   450 ✅ 0 💤 0 ❌
1 350 runs  1 350 ✅ 0 💤 0 ❌

Results for commit c115e18.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 64.55%. Comparing base (59118ee) to head (c115e18).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2377      +/-   ##
==========================================
+ Coverage   64.51%   64.55%   +0.03%     
==========================================
  Files         145      145              
  Lines       26075    26084       +9     
  Branches    15726    15732       +6     
==========================================
+ Hits        16823    16838      +15     
+ Misses       7087     7085       -2     
+ Partials     2165     2161       -4     

Flag	Coverage Δ
projmgr-cov	87.45% <100.00%> (+0.08%)	⬆️

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Files with missing lines	Coverage Δ
tools/projmgr/src/ProjMgr.cpp	80.75% <100.00%> (+0.44%)	⬆️
tools/projmgr/src/ProjMgrCbuildIdx.cpp	96.10% <100.00%> (+0.73%)	⬆️
tools/projmgr/src/ProjMgrWorker.cpp	87.97% <100.00%> (+0.06%)	⬆️

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