Compile on ROS2 Foxy

[henningkayser]

This branch is in preparation of the foxy release including following changes:

• Suppress assimp CMP0012 policy warning (see https://github.com/assimp/assimp/pull/2722, should be fixed with 5.1)
• Removes ASSIMP as (redundant) export dependency to prevent warnings in downstream dependencies
• Disables clang-format check until we found a new format version
• Fixes OCTOMAP target (#150)
• Removed Eloquent from CI (I don't think we want to maintain this when MoveIt 2 runs on Foxy only, this allows us to remove explicit linking of the resource_retriever dependency)

I think we can remove dashing-devel after merging this as we would only support Foxy just like MoveIt 2.

[codecov[bot]]

Codecov Report

Merging #153 into ros2 will decrease coverage by 0.16%. The diff coverage is n/a.

@@            Coverage Diff             @@
##             ros2     #153      +/-   ##
==========================================
- Coverage   55.78%   55.62%   -0.17%     
==========================================
  Files          12       12              
  Lines        1719     1697      -22     
==========================================
- Hits          959      944      -15     
+ Misses        760      753       -7     

Impacted Files	Coverage Δ
src/shapes.cpp	55.33% <0.00%> (-0.99%)	:arrow_down:
src/mesh_operations.cpp	43.47% <0.00%> (-0.30%)	:arrow_down:
src/shape_operations.cpp	32.35% <0.00%> (-0.20%)	:arrow_down:
src/bodies.cpp	69.60% <0.00%> (-0.20%)	:arrow_down:
include/geometric_shapes/shapes.h	100.00% <0.00%> (ø)
include/geometric_shapes/check_isometry.h	100.00% <0.00%> (ø)
include/geometric_shapes/bodies.h	91.30% <0.00%> (+0.39%)	:arrow_up:
src/body_operations.cpp	48.42% <0.00%> (+0.94%)	:arrow_up:

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