Remove translation marker from libpq-be-fe-helpers.h.

Commit 112faf1378 introduced a translation marker in libpq-be-fe-helpers.h,
but this caused build failures on some platforms—such as the one reported
by buildfarm member indri—due to linker issues with dblink. This is the same
problem previously addressed in commit 213c959a29.

To fix the issue, this commit removes the translation marker from
libpq-be-fe-helpers.h, following the approach used in 213c959a29.
It also removes the associated gettext_noop() calls added in commit
112faf1378, as they are no longer needed.

While reviewing this, a gettext_noop() call was also found in
contrib/basic_archive. Since contrib modules don't support translation,
this call has been removed as well.

Per buildfarm member indri.

Author: Fujii Masao <masao.fujii@gmail.com>
Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de>
Discussion: https://postgr.es/m/0e6299d9-608a-4ffa-aeb1-40cb8a99000b@oss.nttdata.com

src/backend/replication/libpqwalreceiver/libpqwalreceiver.c

@@ -233,7 +233,7 @@ libpqrcv_connect(const char *conninfo, bool replication, bool logical,
 	}
 
 	PQsetNoticeReceiver(conn->streamConn, libpqsrv_notice_receiver,
-						gettext_noop("received message via replication"));
+						"received message via replication");
 
 	/*
 	 * Set always-secure search path for the cases where the connection is

src/include/libpq/libpq-be-fe-helpers.h

@@ -481,7 +481,7 @@ libpqsrv_notice_receiver(void *arg, const PGresult *res)
 		len--;
 
 	ereport(LOG,
-			errmsg_internal("%s: %.*s", _(prefix), len, message));
+			errmsg_internal("%s: %.*s", prefix, len, message));
 }
 
 #endif							/* LIBPQ_BE_FE_HELPERS_H */