[projmgr] Ensure AC6 special load handling when user explicit specifies image+symbols

[grasci-arm]

Address #2139 (comment)

[github-actions]

Test Results

    3 files     21 suites   13m 16s ⏱️
  420 tests   420 ✅ 0 💤 0 ❌
1 260 runs  1 260 ✅ 0 💤 0 ❌

Results for commit 3b79f91.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 66.60%. Comparing base (c5bb9ae) to head (3b79f91).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2185   +/-   ##
=======================================
  Coverage   66.59%   66.60%           
=======================================
  Files         181      181           
  Lines       38416    38417    +1     
  Branches    22509    22511    +2     
=======================================
+ Hits        25585    25586    +1     
  Misses       8080     8080           
  Partials     4751     4751           

Flag	Coverage Δ
projmgr-cov	80.77% <100.00%> (+<0.01%)	⬆️

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Files with missing lines	Coverage Δ
tools/projmgr/src/ProjMgrRunDebug.cpp	87.14% <100.00%> (+0.03%)	⬆️

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