### Godot version

v4.0.beta.custom_build [d1e5903c6]

### System information

Arch Linux kernel 6.1.7-arch1-1 x86_64 OpenSSH 9.1p1-3

### Issue description

When using SSH remote deploy, if the extra args field is empty (the default) the ssh command is not executed with success because a single space is inserted in place of the extra args.

```
Creating temporary directory...
Executing: ssh -p 22  davi@192.168.1.50 mktemp -d
Exit code: 255, Output: ssh: Could not resolve hostname : Name or service not known

ssh: Could not resolve hostname : Name or service not known
```

If any valid argument is passed, the command is executed successfully, in the example below I duplicated the `-p 22`, which is ignored, to show that it is not a problem of the hostname passed.

```
Executing: ssh -p 22 -p 22 davi@192.168.1.50 mktemp -d
Exit code: 0, Output: /tmp/tmp.DwFObXBL2s
```

This is infuriating for when you have non-interactive authentication configured in ssh-agent and just the hostname is needed for the connection.
This occurs for both SSH and SCP.

### Steps to reproduce

1. Enable a project to deploy with ssh
2. Fill only the hostname
3. Try to deploy
4. See the error on the console

### Minimal reproduction project

N/A
List<String> args;
	if (FileAccess::exists(p_dmg_path)) {
		OS::get_singleton()->move_to_trash(p_dmg_path);
	}
	args.push_back("create");
	args.push_back(p_dmg_path);
	args.push_back("-volname");
	args.push_back(p_pkg_name);
	args.push_back("-fs");
	args.push_back("HFS+");
	args.push_back("-srcfolder");
	args.push_back(p_app_path_name);
	String str;
	Error err = OS::get_singleton()->execute("hdiutil", args, &str, nullptr, true);
	if (err != OK) {
		add_message(EXPORT_MESSAGE_ERROR, TTR("DMG Creation"), TTR("Could not start hdiutil executable."));
		return err;
	}
	bose("hdiutil returned: " + str);
	if (str.find("create failed") != -1) {
		if (str.find("File exists") != -1) {
			add_message(EXPORT_MESSAGE_ERROR, TTR("DMG Creation"), TTR("`hdiutil create` failed - file exists."));
		} else {
			add_message(EXPORT_MESSAGE_ERROR, TTR("DMG Creation"), TTR("`hdiutil create` failed."));
		}
		return FAILED;
	}
	return OK;
}
bool EditorExportPlatformMacOS::is_shebang(const String &p_path) const {