Merge #21597: test: Document race:validation_chainstatemanager_tests suppression

fab1987 test: Document race:validation_chainstatemanager_tests suppression (MarcoFalke)

Pull request description:

ACKs for top commit:
  jamesob:
    ACK bitcoin/bitcoin@fab1987
  practicalswift:
    ACK fab1987

Tree-SHA512: 3f1838b4cf11eba768ce06826cd4b57c9065669b61a5530af44216fc96535ebf37124b47a8de8f72aedf32345157a72d2208cd63214481a9cb56c063f05db5dd

Author: fanquake

test/sanitizer_suppressions/tsan

@@ -28,7 +28,6 @@ race:BerkeleyBatch
 race:BerkeleyDatabase
 race:DatabaseBatch
 race:leveldb::DBImpl::DeleteObsoleteFiles
-race:validation_chainstatemanager_tests
 race:zmq::*
 race:bitcoin-qt
 
@@ -42,6 +41,10 @@ deadlock:TestPotentialDeadLockDetected
 race:src/qt/test/*
 deadlock:src/qt/test/*
 
+# Race in src/test/main.cpp
+# Can be removed once upgraded to boost test 1.74 in depends
+race:validation_chainstatemanager_tests
+
 # External libraries
 deadlock:libdb
 race:libzmq