Initialize backend status reporting during bootstrap.

This allows a later commit to reduce the number of branches in performance
sensitive functions during normal running, compared to a very minor saving
during bootstrapping.

Author: Melanie Plageman <melanieplageman@gmail.com>
Reviewed-By: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/CAAKRu_Yeg+vh6SHNEo1+=O7e-BPX35cU0XQM=YwQRnkFyv_y+w@mail.gmail.com

Author: anarazel

src/backend/utils/init/postinit.c

@@ -676,8 +676,7 @@ InitPostgres(const char *in_dbname, Oid dboid, const char *username,
 	EnablePortalManager();
 
 	/* Initialize status reporting */
-	if (!bootstrap)
-		pgstat_beinit();
+	pgstat_beinit();
 
 	/*
 	 * Load relcache entries for the shared system catalogs.  This must create