fix(behavior_velocity_planner): keep FINALIZED state in vtl module

[kosuke55]

Description

Keep FINALIZED after end line.
This fix bug of returning to REQUESTING state after end line and inserting stop point.

Related links

porting mistake of https://github.com/tier4/autoware.iv/pull/2413#discussion_r783701590

Tests performed

check in psim

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[codecov]

Codecov Report

Merging #1108 (cf95e13) into main (e78c275) will not change coverage.
The diff coverage is 0.00%.

@@          Coverage Diff          @@
##            main   #1108   +/-   ##
=====================================
  Coverage   9.03%   9.03%           
=====================================
  Files       1025    1025           
  Lines      69508   69508           
  Branches   11742   11742           
=====================================
  Hits        6277    6277           
  Misses     58169   58169           
  Partials    5062    5062           

Flag	Coverage Δ		*Carryforward flag
differential	5.11% <0.00%> (?)
total	9.01% <0.00%> (ø)		Carriedforward from e78c275

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

Impacted Files	Coverage Δ
...r/src/scene_module/virtual_traffic_light/scene.cpp	0.00% <0.00%> (ø)
...map_calibrator/accel_brake_map_calibrator_node.hpp	0.00% <ø> (ø)
...calibrator/src/accel_brake_map_calibrator_node.cpp	0.00% <0.00%> (ø)

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[k-obitsu]

LGTM