[util] Enable cached vertex and index buffers for FFXIV

Fixes some weird performance issues on the Garlemald map. Doesn't seem
to affect performance in other areas.

src/util/config/config.cpp

@@ -248,6 +248,7 @@ namespace dxvk {
     /* Final Fantasy XIV - Stuttering on NV       */
     { R"(\\ffxiv_dx11\.exe$)", {{
       { "dxvk.shrinkNvidiaHvvHeap",         "True" },
+      { "d3d11.cachedDynamicResources",     "vi"   },
     }} },
     /* God of War - relies on NVAPI/AMDAGS for    *
      * barrier stuff, needs nvapi for DLSS        */