Intersections: Consistent behavior of Circle_2 and Sphere_3

[soesau]

Summary of Changes

Circle_2 and Sphere_3 intersections are not fully consistent. The Circle_2 - Segment_2 intersection does consider inclusion as intersection. The same is true for Sphere_3 and Iso_cuboid_3.

This PR changes the behavior of those two intersection methods and adds specific intersection methods with inclusion for Circle_2 and Iso_rectangle_2 to AABB_traits_2 with static filter. The same will be done for Sphere_3, Iso_cuboid_3 and AABB_traits_3.

Release Management

• Affected package(s): AABB_tree, Intersection_2 Intersection_3
• Issue(s) solved (if any): fix #8907, fix #8891, fix #6404

[soesau]

documentation still needs to be updated, but can be tested already

[sloriot]

Looks in CGAL-6.2-Ic-30 but the PR is still under review.

[soesau]

Edit: The timeouts are due to another PR.

I suspect this PR to be responsible for the timeouts . However, the timeouts only concern debug compilations and could not be reproduced locally (msvc).

[sloriot]

Ping @soesau