This update pulls the following commits:
* Add mp_read_double_lossy without direct convertibility checks
* Fix mp_read_double_lossy tests freebsd build

These commits introduce a function required to compare and hash
msgpack values of double key fields as double.

Need for #7483, #5933

NO_DOC=see the next commit
NO_CHANGELOG=see the next commit

(cherry picked from commit be47f8fb)