socket: use non-deprecated OpenSSL 3 APIs

[eli-sterling]

This is the issue-named, current-devel replacement for PR #4710.

Updates: #4271

Validation:

• Configured; libglusterfs.la, XDR dependencies, and socket.lo built successfully with -j 6.
• Focused runtime validation passed on the current rolling Gluster image using a three-node replica-3 Compose topology.
• With server.ssl=on and client.ssl=on, the client mounted the volume and create, write, read, fsync, and unlink operations completed successfully over the SSL data path.

The original PR remains open until this replacement is verified.

[eli-sterling]

Focused runtime validation completed on the current rolling Gluster image using the prepared three-node replica-3 Compose topology.

• Replica-3 volume started successfully with server.ssl=on and client.ssl=on.
• Client mounted the volume successfully.
• Verified create, write, read, fsync, and unlink operations over the SSL data path.
• All operations completed successfully.

The existing focused build validation also passed for socket.lo and its XDR/library dependencies.