pmemkv_put is not thread-safe

[otatebe]

ISSUE: pmemkv_put is not thread-safe

Environment Information

Name	Version
pmemkv version(s)	295fabe
libpmemobj-cpp version(s)	1.13.0
PMDK (libpmem/libpmemobj) version(s)	1.11.1
OS(es) version(s)	ubuntu 22.04
kernel version(s)	5.10.102
compiler, libraries, packaging and other related tools version(s)	gcc, g++

Please provide a reproduction of the bug:

Here is an output of the attached program. This program puts entries of the same key simultaneously.

key = key, value = value2
key = key, value = value1

There are two entries of the same key in the database.

bug.c.txt

This attachment has .txt suffix because .c file cannot be attached. Rename it to bug.c