Prevent ENOBUFS errors by skipping UDP send buffer size configuration

The previous implementation attempted to set the UDP socket's send buffer
size, which could lead to ENOBUFS errors in some environments. This change:
- Overrides setup_socket in UDPConnection to skip buffer size configuration
- Improves socket creation by using the correct address family
- Updates error message to be more accurate ("Failed to setup socket")

This prevents potential buffer-related errors while maintaining the original
functionality for other connection types.

lib/statsd/instrument/connection_behavior.rb

@@ -42,7 +42,7 @@ def setup_socket(original_socket)
         original_socket
       rescue IOError => e
         StatsD.logger.debug do
-          "[#{self.class.name}] Failed to create socket: #{e.class}: #{e.message}"
+          "[#{self.class.name}] Failed to setup socket: #{e.class}: #{e.message}"
         end
         nil
       end

lib/statsd/instrument/udp_connection.rb

@@ -25,11 +25,16 @@ def type
 
       private
 
+      def setup_socket(original_socket)
+        original_socket
+      end
+
       def socket
         @socket ||= begin
-          udp_socket = UDPSocket.new
+          family = Addrinfo.udp(host, port).afamily
+          udp_socket = UDPSocket.new(family)
           setup_socket(udp_socket)&.tap do |s|
-            s.connect(@host, @port)
+            s.connect(host, port)
           end
         end
       end