Fix pg_restore --no-globals SQL output for pg_dumpall archives

Hi,

While testing “[763aaa06f] Add non-text output formats to pg_dumpall” and “[3c19983cc] pg_restore: add --no-globals option to skip globals”, I found that 3c19983cc might have introduced a regression in 763aaa06f.

Here is simple repro:

1. Run a non-text dump-all
```
% pg_dumpall --format=directory --file=/tmp/dumpall_1
```

2. Restoring to a SQL script fails without -C
```
% pg_restore --format=directory --file=/tmp/no_c.sql /tmp/dumpall_1
pg_restore: error: option -C/--create must be specified when restoring an archive created by pg_dumpall
pg_restore: hint: Try "pg_restore --help" for more information.
pg_restore: hint: Individual databases can be restored using their specific archives.
```

3. However, the same restore command succeeds by adding “—no-global”
```
% pg_restore --format=directory --no-global --file=/tmp/no_global_no_c.sql /tmp/dumpall_1
```

Here, --no-globals only indicates that global objects should not be restored. It should not relax the -C requirement when pg_restore is writing a SQL script. As a result, step 3 creates /tmp/no_globals_no_c.sql without CREATE DATABASE commands. If this script is later run against a single target database, objects from multiple source databases can be restored into that database, which is wrong.

4. For comparison, if we add “-C” to the command:
```
% pg_restore --format=directory --no-global -C --file=/tmp/no_global.sql /tmp/dumpall_1
```

Then comparing /tmp/no_globals_no_c.sql with /tmp/no_globals.sql shows that the latter has CREATE DATABASE, ALTER DATABASE, etc. statements:
```
% diff /tmp/no_global_no_c.sql /tmp/no_global.sql
5c5
< \restrict 3TgTUH1Zl28vBD1kEc8akSnRCAZgDK2jL8CiDKNCUad8n99v25VzfCEwgkGUKsl
---
> \restrict P0fvYohAdc92de300rBp7dxCMsvQ0LgDK2ialIwhPBrUPu6TL4IbMngAO1zgoI7
22a23,85
> -- Name: template1; Type: DATABASE; Schema: -; Owner: chaol
> --
>
> CREATE DATABASE template1 WITH TEMPLATE = template0 ENCODING = 'UTF8' LOCALE_PROVIDER = libc LOCALE = 'en_US.UTF-8';
>
>
> ALTER DATABASE template1 OWNER TO chaol;
>

… omit the rest ...
```

I think “-C” should be required unless:

* --globals-only is used, or
* --no-globals is used in direct-restore mode

See the attached patch for the fix details.

Best regards,
--
Chao Li (Evan)
HighGo Software Co., Ltd.
https://www.highgo.com/