tuple: fix crash on hashing tuple with double fields

`tuple_hash_field()` doesn't advance the MsgPack cursor after hashing
a tuple field with the type `double`, which can result in crashes both
in memtx (while inserting a tuple into a hash index) and in vinyl
(while writing a bloom filter on dump or compaction).

The bug was introduced by commit 51af059c ("box: compare and hash
msgpack value of double key field as double").

Closes #10090

NO_DOC=bug fix