CI: test macos (M1) arm64

[casperdcl]

on macos (fixes #1916):

• drop tigre, ccpi-regulariser, ipp*, tomophantom
• bump astra==2.2.0
• native (closes #1974) & docker (closes #1973)
• [x] CI: test
• [ ] CI: fix failing tests
  • [x] relax some array comparison tolerances (circa 1e-7)
  • [ ] astra.log.AstraError: Unable to initialize Projector2D: Configuration error in Projector2D. VolumeGeometry not initialized
  • [ ] dlsym(0x872a2610, Binner_new): symbol not found
• [ ] CI: conda (see also #1918)
• [ ] CI: docker
• [ ] revert debug commit before merge