fix: NavigateToPose.Result has no attribute error_code and log error msg

[Juliaj]

Purpose

Fix

• ROSbot XL demo process given prompts. Help. #753 (comment)

"navigate_to_pose_blocking", error: 'NavigateToPose_Result' object has no attribute 'error_code'

• https://discord.com/channels/1309212732578336808/1309212733039841304/1465025297203204279

"navigate_to_pose_blocking", error: 'NavigateToPose_Result' object has no attribute 'error_message'

Proposed Changes

• send_goal() returns GetResultService.Response instead of NavigateToPose.Result. It is not clear on why during runtime, it would report the attribute error of error_code. Added debug logging to investigate further.
• To get additional error info, checking status and then error message may be more descriptive. The nav2 has limited support for error_code. _get_error_message is to support this.
• In addition to the new tests, the changes in tests are to address [CI] Segfaults in CI with ROS2 Humble unit tests #759 and time to msg handling for humble.

Issues

• Links to relevant issues

Testing

• Unit test added.

[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 66.31%. Comparing base (d506429) to head (394154c).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...ai_core/rai/tools/ros2/navigation/nav2_blocking.py	75.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #757      +/-   ##
==========================================
+ Coverage   65.79%   66.31%   +0.52%     
==========================================
  Files          78       78              
  Lines        3403     3423      +20     
==========================================
+ Hits         2239     2270      +31     
+ Misses       1164     1153      -11     

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[rachwalk]

LGTM