refactor(qp_interface): clean up the code

[takayuki5168]

Description

This package is not used by any package in Autoware currently.

• Changed namespace
  • qp -> autoware::common
• Changed the member variable expression
  • m_XXX -> XXX_ (just my preference according to most of the planning and control packages)
• Added isSolved function
  • Currently, there is no way for the node side to know whether the optimization was successful.
• Minor change to constructors, member functions

Related links

How was this PR tested?

unit test

Notes for reviewers

OSQPInterface in the qp_interface package is not well organized since it's almost just copied from the osqp_interface package.

Interface changes

None.

Effects on system behavior

None.

[github-actions]

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[codecov]

Codecov Report

Attention: Patch coverage is 38.82784% with 167 lines in your changes missing coverage. Please review.

Project coverage is 28.94%. Comparing base (d571fc4) to head (007a5c4).
Report is 2 commits behind head on main.

Files	Patch %	Lines
common/qp_interface/test/test_csc_matrix_conv.cpp	0.00%	0 Missing and 97 partials ⚠️
common/qp_interface/src/osqp_interface.cpp	52.68%	38 Missing and 6 partials ⚠️
common/qp_interface/src/proxqp_interface.cpp	53.84%	15 Missing and 3 partials ⚠️
common/qp_interface/test/test_osqp_interface.cpp	80.76%	0 Missing and 5 partials ⚠️
common/qp_interface/test/test_proxqp_interface.cpp	75.00%	0 Missing and 3 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8029   +/-   ##
=======================================
  Coverage   28.93%   28.94%           
=======================================
  Files        1602     1602           
  Lines      117296   117314   +18     
  Branches    50364    50373    +9     
=======================================
+ Hits        33941    33955   +14     
- Misses      74191    74192    +1     
- Partials     9164     9167    +3     

Flag	Coverage Δ		*Carryforward flag
differential	55.80% <38.82%> (?)
total	28.92% <ø> (-0.02%)	⬇️	Carriedforward from d571fc4

*This pull request uses carry forward flags. Click here to find out more.

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