Attempt to fix flaky 00705_drop_create_merge_tree

tests/queries/0_stateless/00705_drop_create_merge_tree.sh

@@ -7,10 +7,20 @@ CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
 
 function stress()
 {
-    while true; do
+    # We set up a signal handler to make sure to wait for all queries to be finished before ending
+    CONTINUE=true
+    handle_interruption()
+    {
+        CONTINUE=false
+    }
+    trap handle_interruption INT
+
+    while $CONTINUE; do
         ${CLICKHOUSE_CLIENT} --query "CREATE TABLE IF NOT EXISTS table (x UInt8) ENGINE = MergeTree ORDER BY tuple()" 2>/dev/null
         ${CLICKHOUSE_CLIENT} --query "DROP TABLE table" 2>/dev/null
     done
+
+    trap - INT
 }
 
 # https://stackoverflow.com/questions/9954794/execute-a-shell-function-with-timeout
@@ -18,7 +28,7 @@ export -f stress
 
 for _ in {1..5}; do
     # Ten seconds are just barely enough to reproduce the issue in most of runs.
-    timeout 10 bash -c stress &
+    timeout -s INT 10 bash -c stress &
 done
 
 wait