fix: avoid useless cast

[wep21]

Description

fix the following error in rolling distro

/home/daisuke/workspace/autoware/install/osqp_interface/include/osqp_interface/osqp_interface.hpp:36:25: note: in expansion of macro ‘OSQP_INFTY’
   36 | constexpr c_float INF = OSQP_INFTY;
      |                         ^~~~~~~~~~
/opt/ros/rolling/include/osqp/constants.h:100:23: error: useless cast to type ‘c_float’ {aka ‘double’} [-Werror=useless-cast]
  100 | #  define OSQP_INFTY ((c_float)1e30)        // infinity
      |                       ^~~~~~~~~~~~~
/home/daisuke/workspace/autoware/install/osqp_interface/include/osqp_interface/osqp_interface.hpp:36:25: note: in expansion of macro ‘OSQP_INFTY’
   36 | constexpr c_float INF = OSQP_INFTY;
      |                         ^~~~~~~~~~
In file included from /opt/ros/rolling/include/osqp/types.h:9,
                 from /opt/ros/rolling/include/osqp/osqp.h:9,
                 from /home/daisuke/workspace/autoware/install/osqp_interface/include/osqp_interface/osqp_interface.hpp:20,
                 from /home/daisuke/workspace/autoware/src/universe/autoware.universe/control/trajectory_follower/include/trajectory_follower/mpc.hpp:22,
                 from /home/daisuke/workspace/autoware/src/universe/autoware.universe/control/trajectory_follower/src/mpc.cpp:15:
/opt/ros/rolling/include/osqp/constants.h:100:32: warning: use of old-style cast to ‘c_float’ {aka ‘double’} [-Wold-style-cast]
  100 | #  define OSQP_INFTY ((c_float)1e30)        // infinity
      |                                ^~~~
/opt/ros/rolling/include/osqp/constants.h:100:32: note: in definition of macro ‘OSQP_INFTY’
  100 | #  define OSQP_INFTY ((c_float)1e30)        // infinity
      |                                ^~~~
/opt/ros/rolling/include/osqp/constants.h:100:23: error: useless cast to type ‘c_float’ {aka ‘double’} [-Werror=useless-cast]
  100 | #  define OSQP_INFTY ((c_float)1e30)        // infinity
      |                       ^~~~~~~~~~~~~
/home/daisuke/workspace/autoware/install/osqp_interface/include/osqp_interface/osqp_interface.hpp:36:25: note: in expansion of macro ‘OSQP_INFTY’
   36 | constexpr c_float INF = OSQP_INFTY;

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[codecov]

Codecov Report

Merging #853 (bc960ed) into main (acbc54a) will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##            main    #853   +/-   ##
=====================================
  Coverage   9.53%   9.53%           
=====================================
  Files        931     931           
  Lines      57715   57715           
  Branches    6863    6863           
=====================================
  Hits        5505    5505           
  Misses     47686   47686           
  Partials    4524    4524           

Flag	Coverage Δ		*Carryforward flag
differential	14.15% <ø> (?)
total	9.53% <ø> (ø)		Carriedforward from acbc54a

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