Merge bitcoin#28150: test: Avoid intermittent issues due to async eve…

…nts in validationinterface_tests

faca9a3 test: Avoid intermittent issues due to async events in validationinterface_tests (MarcoFalke)

Pull request description:

  Currently the tests have many issues:

  * They setup the genesis block, even though it is not needed
  * They queue an async `UpdatedBlockTip` even, which causes intermittent issues: bitcoin#28146 (comment)

  Fix all issues by trimming down the setup to just `ChainTestingSetup`.

ACKs for top commit:
  Crypt-iQ:
    tACK faca9a3

Tree-SHA512: 4449040330f89bbaf5ce5b2052417c160b451c373987fdf1069596c07834ed81f0aea1506d53c7d2cd21062b27332d30679285dae194b272fd0cb9ce5ded32cf

src/test/validationinterface_tests.cpp

@@ -10,7 +10,7 @@
 #include <util/check.h>
 #include <validationinterface.h>
 
-BOOST_FIXTURE_TEST_SUITE(validationinterface_tests, TestingSetup)
+BOOST_FIXTURE_TEST_SUITE(validationinterface_tests, ChainTestingSetup)
 
 struct TestSubscriberNoop final : public CValidationInterface {
     void BlockChecked(const CBlock&, const BlockValidationState&) override {}