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