refactor(ekf_localizer): removed proc_cov_*_d_ from EKFLocalizer

[SakodaShintaro]

Description

Currently, proc_cov_*_d_ are calculated in ekf_module.cpp.

autoware.universe/localization/ekf_localizer/src/ekf_module.cpp

Lines 182 to 195 in a64566e

	void EKFModule::predict_with_delay(const double dt)
	{
	const Eigen::MatrixXd x_curr = kalman_filter_.getLatestX();
	const Eigen::MatrixXd p_curr = kalman_filter_.getLatestP();
	const double proc_cov_vx_d = std::pow(params_.proc_stddev_vx_c * dt, 2.0);
	const double proc_cov_wz_d = std::pow(params_.proc_stddev_wz_c * dt, 2.0);
	const double proc_cov_yaw_d = std::pow(params_.proc_stddev_yaw_c * dt, 2.0);
	const Vector6d x_next = predict_next_state(x_curr, dt);
	const Matrix6d a = create_state_transition_matrix(x_curr, dt);
	const Matrix6d q = process_noise_covariance(proc_cov_yaw_d, proc_cov_vx_d, proc_cov_wz_d);
	kalman_filter_.predictWithDelay(x_next, a, q);
	}

So we can remove these variables from EKFLocalizer.

How was this PR tested?

I have confirmed that logging_simulator with AWSIM GT rosbag works well and the mean error is almost the same as before.

Notes for reviewers

None.

Interface changes

None.

Effects on system behavior

None.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 24.11%. Comparing base (a64566e) to head (d781b4c).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8640      +/-   ##
==========================================
- Coverage   24.11%   24.11%   -0.01%     
==========================================
  Files        1399     1399              
  Lines      102423   102419       -4     
  Branches    38926    38927       +1     
==========================================
- Hits        24702    24697       -5     
  Misses      75223    75223              
- Partials     2498     2499       +1     

Flag	Coverage Δ		*Carryforward flag
differential	31.15% <ø> (?)
total	24.11% <ø> (-0.01%)	⬇️	Carriedforward from a64566e

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