chore: bump version to 1.2.0

[mitsudome-r]

Description

This bumps the version of autoware_internal_msgs to 1.2.0.

This release is necessary to use the stamped messages added in #31 for migration discussed in autowarefoundation/autoware#5580.

Related links

autowarefoundation/autoware#5580

Tests performed

I've tested build locally with the full autoware stack.

Notes for reviewers

Effects on system behavior

None.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 0.00%. Comparing base (a701d19) to head (516e366).
Report is 21 commits behind head on main.

Additional details and impacted files

@@         Coverage Diff          @@
##            main   #32    +/-   ##
====================================
  Coverage   0.00%     0            
====================================
  Files         12     0    -12     
  Lines        391     0   -391     
====================================
+ Misses       391     0   -391     

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[youtalk]

@mitsudome-r Please try to run bloom-release.
https://docs.ros.org/en/jazzy/How-To-Guides/Releasing/First-Time-Release.html#bloom-release

[mitsudome-r]

ros/rosdistro#43985

[youtalk]

@mitsudome-r Since we have also already released for Jazzy and Rolling, could you take care of those as well?
https://github.com/ros2-gbp/autoware_internal_msgs-release?tab=readme-ov-file#autoware_internal_msgs-rolling---110-1
https://github.com/ros2-gbp/autoware_internal_msgs-release?tab=readme-ov-file#autoware_internal_msgs-jazzy---110-1