[wasm] Increase beforeAll timeout that loads wasm files (#6618)
[wasm] Increase beforeAll timeout that loads wasm files (#6618)

Increase the beforeAll timeout for fetching wasm files from 5 seconds to 30 to fix a Safari nightly failure.
tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs