MT#65440 Switch Redis-like server name from obsolete KeyDB to Valkey

We have completely removed the KeyDB support. Update the server name to
use the currently supported Redis-like server.

Change-Id: I2f27d91f5659a18d4a581933594a69561ec81382

ngcp-cleanup-sems

@@ -10,7 +10,7 @@ my $service_restart = 1;
 lprint("=====================");
 lprint("script start");
 
-my $server_name = 'keydb';
+my $server_name = 'valkey';
 
 # find bind IP from redis config file