C++: Set minimum version for CppTrapCachingEnabled FF.

Author: sashabu

lib/feature-flags.js

@@ -71,7 +71,7 @@ export const featureConfig: Record<
   },
   [Feature.CppTrapCachingEnabled]: {
     envVar: "CODEQL_CPP_TRAP_CACHING",
-    minimumVersion: undefined,
+    minimumVersion: "2.16.1",
     defaultValue: false,
   },
   [Feature.DisableKotlinAnalysisEnabled]: {