Integration tests: add IPC_LOCK and SYS_NICE caps

It is needed to make integration tests work with a installed binary (/usr/bin/clickhouse) mounted in.
Otherwise the binary mounted in have the capability, while the container is not allowing that
and you get cryptic message:
standard_init_linux.go:211: exec user process caused "operation not permitted"

tests/integration/helpers/cluster.py

@@ -868,6 +868,8 @@ services:
         cap_add:
             - SYS_PTRACE
             - NET_ADMIN
+            - IPC_LOCK
+            - SYS_NICE
         depends_on: {depends_on}
         user: '{user}'
         env_file: