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ARROW-12166: [C++][Gandiva] Implements CONVERT_TO(value, type) function

Implements the CONVERT_TO function inside the Gandiva, which receives a value for a defined type and returns its bytes representation.

The behavior is based on Apache Drill implementation: https://drill.apache.org/docs/data-type-conversion/#convert_to-and-convert_from

Closes #9861 from anthonylouisbsb/feature/add-convert-to-function and squashes the following commits:

22d80a3a4 <Anthony Louis> Use capital letters in name
90e28236d <Anthony Louis> Change functions names and tests
3a88586ea <Anthony Louis> Change functions name
f3e06d236 <Anthony Louis> Fix macros for bigendian tests
c817a0501 <Anthony Louis> Fix function comment
80539816c <Anthony Louis> Add CONVERT_TO functions for big endian formats
ad991a66f <Anthony Louis> Add tests for the convert_to functions
3b1bccabc <Anthony Louis> Add convert_toBOOLEAN_BYTE function
36b2458e4 <Anthony Louis> Add convert_toBIGINT function
a17edda5e <Anthony Louis> Add convert_toTIME_EPOCH function
448ffcf06 <Anthony Louis> Add convert_toINT
c7d0010c6 <Anthony Louis> Add convert_toDOUBLE function

Authored-by: Anthony Louis <anthony@simbioseventures.com>
Signed-off-by: Praveen <praveen@dremio.com>