adding physical and math BC types for inflow-outflow BCs (#3965)

## Summary
This feature would be useful for managing boundaries with both inflow
and outflow cells. By adding these types in AMReX, they can be used
consistently across various inter-dependent codes such as IAMR,
AMReX-Hydro, and AMR-Wind.

## Additional background
The ongoing addition of an inflow-outflow BC in AMR-Wind is the primary
motivation.

Src/Base/AMReX_BC_TYPES.H

@@ -60,23 +60,24 @@ namespace amrex {
 
 namespace PhysBCType {
 enum physicalBndryTypes : int {interior=0,inflow,outflow,symmetry,
- slipwall,noslipwall};
+ slipwall,noslipwall,inflowoutflow};
 }
 
 namespace BCType {
 enum mathematicalBndryTypes : int {
- bogus = -666,
- reflect_odd = -1,
- int_dir = 0,
- reflect_even = 1,
- foextrap = 2,
- ext_dir = 3,
- hoextrap = 4,
- hoextrapcc = 5,
- ext_dir_cc = 6,
- user_1 = 1001,
- user_2 = 1002,
- user_3 = 1003
+ bogus = -666,
+ reflect_odd = -1,
+ int_dir = 0,
+ reflect_even = 1,
+ foextrap = 2,
+ ext_dir = 3,
+ hoextrap = 4,
+ hoextrapcc = 5,
+ ext_dir_cc = 6,
+ direction_dependent = 7,
+ user_1 = 1001,
+ user_2 = 1002,
+ user_3 = 1003
 };
 }