Omit performance warning when creating OptimizationProblem

[fhagemann]

Tired of seeing this warning?

Say no more. We can replace [] by () (Tuple instead of Vector) to avoid this warning:

This is done everywhere in LegendSpecFits in this PR.

[codecov]

Codecov Report

Attention: Patch coverage is 73.33333% with 4 lines in your changes missing coverage. Please review.

Project coverage is 29.18%. Comparing base (10e8e19) to head (73f84cb).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/aoe_ctc.jl	0.00%	1 Missing ⚠️
src/ctc.jl	0.00%	1 Missing ⚠️
src/lqfit.jl	0.00%	1 Missing ⚠️
src/singlefit.jl	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #122      +/-   ##
==========================================
- Coverage   29.24%   29.18%   -0.06%     
==========================================
  Files          37       37              
  Lines        3447     3447              
==========================================
- Hits         1008     1006       -2     
- Misses       2439     2441       +2     

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[theHenks]

Thanks, this also reduces the messages I see in the dataflow by a lot