fix: Integration test instability (#3597)

There are a couple of changes here which should improve stability of the tests.  Hopefully that will be sufficient, but it is difficult to tell for sure if it is complete.

extensions/cornerstone/src/init.tsx

@@ -54,12 +54,11 @@ export default async function init({
     },
   });
 
-  // For debugging large datasets
-  const MAX_CACHE_SIZE_1GB = 1073741824;
-  const maxCacheSize = appConfig.maxCacheSize;
-  cornerstone.cache.setMaxCacheSize(
-    maxCacheSize ? maxCacheSize : MAX_CACHE_SIZE_1GB
-  );
+  // For debugging large datasets, otherwise prefer the defaults
+  const { maxCacheSize } = appConfig;
+  if (maxCacheSize) {
+    cornerstone.cache.setMaxCacheSize(maxCacheSize);
+  }
 
   initCornerstoneTools();