Mesh refinement: pass vector of geometries to field solve functions

[SeverinDiederichs]

This PR prepares the field interpolation from the coarse to the fine level.

Instead of passing just the geometry of the level, which is currently solved, now a vector of all geometries is passed and the appropriate geometry is used in the field solvers.

Now, the geometry of both levels can be accessed within the field solver functions

• Small enough (< few 100s of lines), otherwise it should probably be split into smaller PRs
• Tested (describe the tests in the PR description)
• Runs on GPU (basic: the code compiles and run well with the new module)
• Contains an automated test (checksum and/or comparison with theory)
• Documented: all elements (classes and their members, functions, namespaces, etc.) are documented
• Constified (All that can be const is const)
• Code is clean (no unwanted comments, )
• Style and code conventions are respected at the bottom of https://github.com/Hi-PACE/hipace
• Proper label and GitHub project, if applicable