Following the introduction of `moveRange` in v6.0, that review the move chunk paths to get rid of all the unused code.

Examples:

• Get rid of the moveChunk alias since only moveRange must be called by the CSRS in case of FCV >= v6.0 (keep in mind multiversion compatibility)
• Get rid of _configsvrMoveChunk command as routers are calling into moveRange even if users invoke moveChunk (keep in mind multiversion compatibility)
• Get rid of all requestMoveChunk calls in favour requestMoveRange and remove of all the dead code around (e.g. MoveChunkCommandInfo that will not be useful anymore)