sql: use double_compare_uint64() for int<->float cmp

To compare floating point values and integers in SQL functions
compare_uint_float() and compare_int_float() are used. Unfortunately,
they contain bug connected with checking border case: that's not correct
to cast UINT64_MAX (2^64 - 1) to double. Proper way is to use exp2(2^64)
or predefined floating point constant. To not bother fixing function
which in turn may contain other tricky places, let's use instead already
verified double_compare_uint64(). So that we have unified way of
integer<->float comparison.

(cherry picked from commit 73a4a525)