Add arange default values

[tkarna]

• arange now supports Array API default values
  • sp.arange(0, 4, 1) -> [0, 1, 2, 3] as before
  • sp.arange(0, 4) -> [0, 1, 2, 3]
  • sp.arange(4) -> [0, 1, 2, 3]
  • sp.arange(4, 0) -> []
  • sp.arange(0, 4, -1) -> []
• Also removes unnecessary all_axes reduction argument in wave and shallow water benchmarks

[fschlimb]

Nice!