zmq: Fix due to invalid argument and multiple notifiers (João Barbosa)
Pull request description:
ZMQ initialization is interrupted if any notifier fails, and in that case all notifiers are destroyed. The notifier shutdown assumes that the initialization had occurred. This is not valid when there are multiple notifiers and any except the last fails to initialize.
Can be tested by running test/functional/interface_zmq.py from this branch with bitcoind from master.
Closes #17185.
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Backport of Core PR17445