CCCL C: Size struct members should have consistent type size_t, alignment should use unsigned type

[oleksandr-pavlyk]

Struct cccl_type_info defines size member to have type int (should be size_t), and aligntment to have type int, should be unsigned int instead.

Struct cccl_op_t defines size member to be of type int, as well as ltoir_size. Both should have type size_t. The alignment member should have type unsigned int.

Struct cccl_iterator_t defines size member to be of type int (should be size_t). Similarly, the alignment member should have type unsigned int.

[oleksandr-pavlyk]

@shwina @leofang @NaderAlAwar @gevtushenko Any objections to the proposed change?

[gevtushenko]

Any objections to the proposed change?

No objections

[oleksandr-pavlyk]

Actually, size members should have the type consistent with return type of sizeof(T), i.e., size_t.

Alignment members should be typed consistently with return type of alignof(T), i.e., size_t.