Run API tests against the sandbox runtime (#42264)

Summary:
X-link: https://github.com/facebook/hermes/pull/1248

Pull Request resolved: https://github.com/facebook/react-native/pull/42264

Add a buck build for the sandbox, and run our existing API tests
against it.

Reviewed By: avp

Differential Revision: D48086019

fbshipit-source-id: 2ee2eca93e27557d2609eaaec2fce3218d8b873f

packages/react-native/ReactCommon/jsi/jsi/test/testlib.cpp

@@ -1444,8 +1444,13 @@ TEST_P(JSITest, ArrayBufferSizeTest) {
   auto ab =
       eval("var x = new ArrayBuffer(10); x").getObject(rt).getArrayBuffer(rt);
   EXPECT_EQ(ab.size(rt), 10);
-  // Ensure we can safely write some data to the buffer.
-  memset(ab.data(rt), 0xab, 10);
+
+  try {
+    // Ensure we can safely write some data to the buffer.
+    memset(ab.data(rt), 0xab, 10);
+  } catch (const JSINativeException& ex) {
+    // data() is unimplemented by some runtimes, ignore such failures.
+  }
 
   // Ensure that setting the byteLength property does not change the length.
   eval("Object.defineProperty(x, 'byteLength', {value: 20})");