rust: fix signature of rustlazyancestors_init() function
Obviously, sizeof(int) != mem::size_of::<usize>() on amd64, though the
argument would be passed in 64-bit register anyway.
tests: require SQLite 3.8.3+ as sqlitestore relies on "WITH" clause
The test fails on gcc112 because the SQLite is too old.
https://sqlite.org/changes.html#version_3_8_3