fix(autoware_image_projection_based_fusion): roi cluster fusion has no existence probability update

[technolojin]

Description

The roi cluster fusion updates cluster classification from the roi to the cluster.
However, the existence probability was not updated.

This PR adds the existence probability update from the roi to the cluster.

Related links

Parent Issue:

• Link

How was this PR tested?

Notes for reviewers

None.

Interface changes

None.

Effects on system behavior

None.

[github-actions]

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[yukkysaito]

LGTM

[badai-nguyen]

LGTM

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 9 lines in your changes missing coverage. Please review.

Project coverage is 28.00%. Comparing base (9f7ba86) to head (b86720d).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...ction_based_fusion/src/roi_cluster_fusion/node.cpp	0.00%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8864      +/-   ##
==========================================
- Coverage   28.00%   28.00%   -0.01%     
==========================================
  Files        1316     1316              
  Lines       98601    98607       +6     
  Branches    39771    39773       +2     
==========================================
+ Hits        27615    27616       +1     
- Misses      70840    70845       +5     
  Partials      146      146              

Flag	Coverage Δ		*Carryforward flag
differential	4.27% <0.00%> (?)
total	28.01% <ø> (+<0.01%)	⬆️	Carriedforward from 9f7ba86

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