feat(geography_utils): add mgrs code in projector

[takayuki5168]

Description

Without this PR, when handling the MGRS projector created by geography_utils::get_lanelet2_projector, the following error occurred.
https://github.com/autowarefoundation/autoware_common/blob/6bbda6513206ea968f76f310a4bf2847bff3a583/tmp/lanelet2_extension/lib/mgrs_projector.cpp#L82-L83

Tests performed

Run static_centerline_optimizer's script

Effects on system behavior

Nothing

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[kminoda]

Thank you! LGTM

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (7676228) 15.24% compared to head (9202230) 15.24%.
Report is 9 commits behind head on main.

Files	Patch %	Lines
common/geography_utils/src/lanelet2_projector.cpp	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5990   +/-   ##
=======================================
  Coverage   15.24%   15.24%           
=======================================
  Files        1750     1750           
  Lines      120658   120680   +22     
  Branches    36738    36754   +16     
=======================================
+ Hits        18392    18397    +5     
  Misses      81638    81638           
- Partials    20628    20645   +17     

Flag	Coverage Δ		*Carryforward flag
differential	23.00% <0.00%> (?)
total	15.24% <ø> (ø)		Carriedforward from 7676228

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

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