Binary is not stripped by default even in the release build [API-2357]

C++ compiler version: 10.2.1
Hazelcast Cpp client version: 5.0.0
Hazelcast server version: -
Number of the clients: -
Cluster size, i.e. the number of Hazelcast cluster members: Linux
OS version (Windows/Linux/OSX):

Please attach relevant logs and files for client and server side.

#### Expected behaviour
After release build stripping must be done automatically by CMake itself.

#### Actual behaviour
There is no stripping at all.

#### Steps to reproduce the behaviour
In the current version, a generated shared library size is 8229280 byte. After stripping a shared library with "strip -s libhazelcast-cpp-client.so.5.0.0" command, it will become 5654584 byte at all.