Out of bound read in on_replace when inserting into _index with 0 parts. #8688
Description
If an index definition is inserted directly into box.space._index which has an empty parts list, there's an out of bounds read in key_def_contains_sequential_parts.
This line contains a bug
tarantool/src/box/tuple_extract_key.cc
Line 26 in 1315923
Because def->part_count is 0 and ((uint32_t)0) - 1 == UINT32_MAX.
This doesn't always result in a segfault, but you can verify in the debugger that in this loop out bounds memory is being read.