Remove colcon-mixin-name

[christophebedard]

This removes colcon-mixin-name and updates examples & tests to use colcon-defaults instead.

I also fixed some issues that I uncovered:

• asan mixin doesn't exist; asan-gcc does
• when setting options.env, you probably want to include process.env, otherwise the environment gets reset to nothing + whatever you provide with options.env; this was making runs that used colcon-defaults with C++ packages fail because cmake couldn't find any compiler
• for Docker jobs, colcon uses /root/ as the home directory for some reason (you can see this when the action runs colcon mixin update ...), which isn't the same home directory that we use when deleting the .colcon/ directory to clean up between jobs

Signed-off-by: Christophe Bedard bedard.christophe@gmail.com

[codecov]

Codecov Report

Merging #591 (8d47b91) into master (3018c9a) will decrease coverage by 0.17%.
The diff coverage is 20.00%.

❗ Current head 8d47b91 differs from pull request most recent head 7ca7dcc. Consider uploading reports for the commit 7ca7dcc to get more accurate results

@@            Coverage Diff             @@
##           master     #591      +/-   ##
==========================================
- Coverage   38.63%   38.46%   -0.18%     
==========================================
  Files           2        2              
  Lines         220      221       +1     
  Branches       41       42       +1     
==========================================
  Hits           85       85              
- Misses        135      136       +1     

Impacted Files	Coverage Δ
src/action-ros-ci.ts	29.16% <20.00%> (-0.16%)	⬇️

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[christophebedard]

After merging this, we can probably close #526 and #525.

[emersonknapp]

LGTM!