Revert "pg_resetwal: Improve error with wrong/missing data directory"

This reverts commit 1d863c2504.

This broke specifying the data directory as a relative path.

Reported-by: Hayato Kuroda (Fujitsu) <kuroda.hayato@fujitsu.com>
Discussion: https://www.postgresql.org/message-id/flat/TYAPR01MB58664AD301F511B1EA5B72B4F5C0A%40TYAPR01MB5866.jpnprd01.prod.outlook.com

src/bin/pg_resetwal/pg_resetwal.c

@@ -345,10 +345,6 @@ main(int argc, char *argv[])
 
 	get_restricted_token();
 
-	if (chdir(DataDir) < 0)
-		pg_fatal("could not change directory to \"%s\": %m",
-				 DataDir);
-
 	/* Set mask based on PGDATA permissions */
 	if (!GetDataDirectoryCreatePerm(DataDir))
 		pg_fatal("could not read permissions of directory \"%s\": %m",
@@ -356,6 +352,10 @@ main(int argc, char *argv[])
 
 	umask(pg_mode_mask);
 
+	if (chdir(DataDir) < 0)
+		pg_fatal("could not change directory to \"%s\": %m",
+				 DataDir);
+
 	/* Check that data directory matches our server version */
 	CheckDataVersion();