Fix test added by commit 9de9294b0c.

Fix test added by commit 9de9294b0c.

The buildfarm members "drongo" and "fairywren" reported that
the regression test (024_archive_recovery.pl) added by commit 9de9294b0c
failed. The cause of this failure is that the test calls $node->init()
without "allows_streaming => 1" and which doesn't add pg_hba.conf
entry for TCP/IP connection from pg_basebackup.
This commit fixes the issue by specifying "allows_streaming => 1"
when calling $node->init().

Author: Fujii Masao
Discussion: https://postgr.es/m/3cc3909d-f779-7a74-c201-f1f7f62c7497@oss.nttdata.com