THRIFT-5744: Switch to slog for go library

Client: go
diff --git a/lib/go/test/go.mod b/lib/go/test/go.mod
index 59535e6..0c032b7 100644
--- a/lib/go/test/go.mod
+++ b/lib/go/test/go.mod
@@ -1,6 +1,6 @@
 module github.com/apache/thrift/lib/go/test
 
-go 1.20
+go 1.21
 
 require (
 	github.com/apache/thrift v0.0.0-00010101000000-000000000000