Remove inner Coordinate struct from TableMultiVariableLookup

[#73049874]
Remove typedef for Coordinate and Point

Also prevent adding duplicate points.

[#73049874]
Merge remote-tracking branch 'remotes/origin/73049874-InnerCoordinate' into develop
Avoid Coordinate and Point typedefs
Merge remote-tracking branch 'remotes/origin/73049874-InnerCoordinate' into develop