qom: Make InterfaceInfo[] uses const

Mechanical change using:

  $ sed -i -E 's/\(InterfaceInfo.?\[/\(const InterfaceInfo\[/g' \
              $(git grep -lE '\(InterfaceInfo.?\[\]\)')

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20250424194905.82506-7-philmd@linaro.org>

system/qtest.c

@@ -1012,7 +1012,7 @@ static const TypeInfo qtest_info = {
     .parent = TYPE_OBJECT,
     .class_init = qtest_class_init,
     .instance_size = sizeof(QTest),
-    .interfaces = (InterfaceInfo[]) {
+    .interfaces = (const InterfaceInfo[]) {
         { TYPE_USER_CREATABLE },
         { }
     }