Fix particle boundary conditions in curvilinear geometries

[JustinRayAngus]

This PR adds helper routines for transforming a particle’s momentum between Cartesian coordinates and the local curvilinear basis. Before calling ApplyParticleBoundaries::apply_boundaries(), particle momentum is transformed into the curvilinear basis and then transformed back to Cartesian coordinates afterward. This simplifies the logic in apply_boundaries() and fixes several bugs and oversights in particle boundary handling for RZ, RCYLINDER, and RSPHERE geometries.

Issues fixed in this PR for curvilinear geometries:

• incorrect transform applied for reflecting particles in RSPHERE geometry (see PR Fix RSPHERE particle-boundary momentum basis #7195)
• forward and backward transformation was applied to ALL particles when using RSPHERE geometry
• incorrect normal and tangential velocity components passed to thermalize_boundary_particles() at radial (x) boundaries

[dpgrote]

Looks good!