Fix fetchMissingData with remote blockchain

[mitschabaude]

No description provided.

[mitschabaude]

doesn't seem to do the right thing anymore
causing stuff like

Error: x.get() failed, because the zkapp account was not found in the cache. Try calling `await fetchAccount(zkappAddress)` first.

[shimkiv]

https://github.com/o1-labs/e2e-tests/issues/34

[shimkiv]

Issue still persists.

• Deploy zkApp with some initial account state (say, appState[0] = 2);
• In SnarkyJS Web version reload the page after SC deployment to make sure the state won't be available and zkApp SC instance will be re-instantiated if needed;
• Invoke zkApp's method with some constraints (for example the update one passing same value 2 as was used with deployment) by calling it in Web version, similarly to updateOnChainZkAppStateWeb() method.

SC method invocation will result in the error like this "Error: assert_equal: 0 != 2", where 0 means that the current state of the account is unknown.
But should you manually fetch the account's state after this, like calling the await fetchAccount(...), and invoke update method again - you will receive the correct (for this SC) error "Error: assert_equal: 4 != 2", where 4 means that now account's state reflects the truth.