[SWIG] Add support for int64_t ChunkedArray

[StrikerRUS]

Refer to #3997 (comment).

LightGBM/swig/ChunkedArray_API_extensions.i

Lines 16 to 21 in 2e54d5f

	/* Unfortunately, for the time being,
	* SWIG has issues generating the overloads to coalesce_to()
	* for larger integral types
	* so we won't support that for now:
	*/
	//%template(int64ChunkedArray) ChunkedArray<int64_t>;

cc @AlbertoEAF

[StrikerRUS]

Closed in favor of being in #2302. We decided to keep all feature requests in one place.

Welcome to contribute this feature! Please re-open this issue (or post a comment if you are not a topic starter) if you are actively working on implementing this feature.