erofs-utils: lib: rearrange struct erofs_configure

erofs-utils: lib: rearrange struct erofs_configure

Move the fields controlled by the NDEBUG macro to the end
to maintain a consistent layout for preceding variables.

It addresses cases where a third-party application does not define
NDEBUG while erofs-utils does.  Ideally, third-party applications
should use the same macros as erofs-utils to get a unique
`struct erofs_configure`. However, since NDEBUG enables unnecessary
assertions, restructuring the layout resolves such inconsistencies.

Fixes: ad6c80dc168d ("erofs-utils: lib: add erofs_get_configure()")
Signed-off-by: Hongzhen Luo <hongzhen@linux.alibaba.com>
Link: https://lore.kernel.org/r/20241111095715.3814956-1-hongzhen@linux.alibaba.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>