test(autoware_qp_interface): add unit tests for initializeProblem

[NorahXiong]

Description

Related links

Parent Issue:

#173

How was this PR tested?

Notes for reviewers

None.

Interface changes

None.

Effects on system behavior

None.

[github-actions]

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[codecov]

Codecov Report

Attention: Patch coverage is 89.55224% with 14 lines in your changes missing coverage. Please review.

Project coverage is 75.85%. Comparing base (4cb18f5) to head (e01c67e).
Report is 66 commits behind head on main.

Files with missing lines	Patch %	Lines
...n/autoware_qp_interface/test/test_qp_interface.cpp	88.88%	0 Missing and 7 partials ⚠️
...autoware_qp_interface/test/test_osqp_interface.cpp	90.62%	0 Missing and 6 partials ⚠️
...toware_qp_interface/test/test_proxqp_interface.cpp	85.71%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #237      +/-   ##
==========================================
- Coverage   78.75%   75.85%   -2.90%     
==========================================
  Files          11       10       -1     
  Lines         193      700     +507     
  Branches       73      448     +375     
==========================================
+ Hits          152      531     +379     
- Misses         11       35      +24     
- Partials       30      134     +104     

Flag	Coverage Δ
differential	75.85% <89.55%> (?)
total	?

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