[csolution] Fix: Unsupported registered toolchain causes error in unelated contexts

[spcaipers-arm]

No description provided.

[github-actions]

Test Results

    3 files     18 suites   9m 46s ⏱️
  382 tests   382 ✅ 0 💤 0 ❌
1 146 runs  1 146 ✅ 0 💤 0 ❌

Results for commit 0c034b7.

[codecov]

Codecov Report

Attention: Patch coverage is 84.00000% with 8 lines in your changes missing coverage. Please review.

Project coverage is 65.52%. Comparing base (98f8b4e) to head (0c034b7).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
tools/projmgr/test/src/ProjMgrUnitTests.cpp	77.14%	0 Missing and 8 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1976      +/-   ##
==========================================
+ Coverage   65.50%   65.52%   +0.02%     
==========================================
  Files         173      173              
  Lines       35221    35259      +38     
  Branches    20449    20469      +20     
==========================================
+ Hits        23070    23102      +32     
+ Misses       7915     7914       -1     
- Partials     4236     4243       +7     

Flag	Coverage Δ
projmgr-cov	81.81% <84.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
tools/projmgr/src/ProjMgrWorker.cpp	88.14% <100.00%> (+0.01%)	⬆️
tools/projmgr/test/src/ProjMgrUnitTests.cpp	80.74% <77.14%> (-0.03%)	⬇️

... and 1 file with indirect coverage changes