Reformulate a for-in loop to a for loop in wasm.xWrap() to work around downstream frameworks modifying the JS Array prototype, as reported in [forum:b549992634b55104|forum post b549992634b55104]. (tags: branch-3.45)

Reformulate a for-in loop to a for loop in wasm.xWrap() to work around downstream frameworks modifying the JS Array prototype, as reported in [forum:b549992634b55104|forum post b549992634b55104]. (tags: branch-3.45)