Use test.nix for running test-statistics.sh

Author: ttuegel

test/regression-evm/test-statistics.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env nix-shell
-#!nix-shell -i bash -p jq
+#!nix-shell ../../test.nix -i bash -p jq
 
 set -xeou pipefail