Merge #6315: test: call self.generate() in p2p_net_deadlock.py (follow-up dash#6276)

9b0c506cf0 test: call `self.generate()` in `p2p_net_deadlock.py` (Kittywhiskers Van Gogh)

Pull request description:

  ## Additional Information

  `develop` is currently borked ([build](https://gitlab.com/dashpay/dash/-/jobs/7999893074#L266)) because [dash#6288](https://github.com/dashpay/dash/pull/6288) changed the expected syntax for `generate*` calls and [dash#6276](https://github.com/dashpay/dash/pull/6276) introduced a new test (`p2p_net_deadlock.py`) that was based on a version of `develop` that used the older syntax.

  No conflicts were reported because it was a new file introduced in the latter PR that the former PR did not have knowledge of.

  ## Breaking changes

  None expected.

  ## Checklist:

  - [x] I have performed a self-review of my own code
  - [x] I have commented my code, particularly in hard-to-understand areas **(note: N/A)**
  - [x] I have added or updated relevant unit/integration/functional/e2e tests
  - [x] I have made corresponding changes to the documentation **(note: N/A)**
  - [x] I have assigned this pull request to a milestone _(for repository code-owners and collaborators only)_

ACKs for top commit:
  UdjinM6:
    utACK 9b0c506cf0
  PastaPastaPasta:
    utACK 9b0c506cf0

Tree-SHA512: 3b49f0ff4fc5beea8bd48019c581577ebb47cf50c5526e60367740e5deea7fc92451a480abd49b2b3b2a7be7fb9ca2a4aca99c565ef7aaee1ba8cce43e0be776

test/functional/p2p_net_deadlock.py

@@ -29,8 +29,7 @@ class NetDeadlockTest(BitcoinTestFramework):
         thread1.join()
 
         self.log.info("Check whether a deadlock happened")
-        self.nodes[0].generate(1)
+        self.generate(self.nodes[0], 1)
-        self.sync_blocks()
 
 
 if __name__ == '__main__':