Fix sqlparser cannot parse 'set names binary' (#18582)

Signed-off-by: canoriz <[email protected]>

Author: canoriz

go/vt/sqlparser/parse_test.go

@@ -1451,6 +1451,9 @@ var (
 	}, {
 		input:  "set names utf8 collate 'foo'",
 		output: "set names 'utf8'",
+	}, {
+		input:  "set names binary",
+		output: "set names 'binary'",
 	}, {
 		input:  "set character set utf8",
 		output: "set charset 'utf8'",