Don't pass temporaries via initializer_list

[AlanGriffiths]

Fixes: #3014

[AlanGriffiths]

This code originated with a "Fix FTBFS with g++-13", so let's first see if it builds everywhere

[codecov]

Codecov Report

Merging #3015 (ccd433e) into main (630ae49) will increase coverage by 0.00%.
Report is 2 commits behind head on main.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #3015   +/-   ##
=======================================
  Coverage   77.70%   77.71%           
=======================================
  Files        1058     1058           
  Lines       73416    73416           
=======================================
+ Hits        57051    57057    +6     
+ Misses      16365    16359    -6     

Files Changed	Coverage Δ
...sts/unit-tests/input/test_touchspot_controller.cpp	98.33% <100.00%> (ø)

... and 4 files with indirect coverage changes

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[Saviq]

Yup!