core#20258:

The CNode member nSendBytes is incremented under the node's lock cs_vSend. However, RecordBytesSent is not. An RPC thread that acquires the cs_vSend lock puts the message handler thread on hold. While the thread is on hold, getnettotals returns "stale" values or values that don't add up.

We make no guarantees about consistency between RPC calls.

core#20299

The test fails intermittently because getpeerinfo and getnettotals are not synchronised, so a wait_until is needed for each RPC (separately).

This is a backport of core#20258 and core#20299

test/functional/test_runner.py rpc_net.py