Merge #16302: test: Add missing syncwithvalidationinterfacequeue to wallet_balance test

Summary:
fa815255c70d32809aac640db4a8762c7d71e8db test: Add missing sync_all to wallet_balance test (MarcoFalke)

Pull request description:

A `syncwithvalidationinterfacequeue` should be sufficient.

Fixes  #16020

ACKs for top commit:

promag:
  ACK fa81525. This can be tested by adding sleep in `CWallet::BlockConnected` just before `LOCK(cs_wallet)` - master will always fail while this PR will succeed.

Tree-SHA512: 07e067c698627f90f0b9848f921b7067adc70c27105db3258e056384197e50dbee055c87839d238cc11bde11179d3f5879b39e1c8e15465f8f07558c694b677d

Backport of Core PR16302

Test Plan: test_runner.py wallet_balance

Reviewers: #bitcoin_abc, majcosta

Reviewed By: #bitcoin_abc, majcosta

Differential Revision: https://reviews.bitcoinabc.org/D6954