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

fa81525 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

Author: MarcoFalke

test/functional/wallet_balance.py

@@ -203,6 +203,8 @@ def test_balances(*, fee_node_1=0):
         self.log.info('Put txs back into mempool of node 1 (not node 0)')
         self.nodes[0].invalidateblock(block_reorg)
         self.nodes[1].invalidateblock(block_reorg)
+        self.sync_blocks()
+        self.nodes[0].syncwithvalidationinterfacequeue()
         assert_equal(self.nodes[0].getbalance(minconf=0), 0)  # wallet txs not in the mempool are untrusted
         self.nodes[0].generatetoaddress(1, ADDRESS_WATCHONLY)
         assert_equal(self.nodes[0].getbalance(minconf=0), 0)  # wallet txs not in the mempool are untrusted