### 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
String rcedit_path = EDITOR_GET("export/windows/rcedit");
	if (rcedit_path != String() && !FileAccess::exists(rcedit_path)) {
		add_message(EXPORT_MESSAGE_WARNING, TTR("Resources Modification"), vformat(TTR("Could not find rcedit executable at \"%s\"."), rcedit_path));
		return ERR_FILE_NOT_FOUND;
	}
	if (rcedit_path == String()) {
		rcedit_path = "rcedit"; 
	}
#ifndef WINDOWS_ENABLED
	
	String wine_path = EDITOR_GET("export/windows/wine");
	if (!wine_path.is_empty() && !FileAccess::exists(wine_path)) {
		add_message(EXPORT_MESSAGE_WARNING, TTR("Resources Modification"), vformat(TTR("Could not find wine executable at \"%s\"."), wine_path));
		return ERR_FILE_NOT_FOUND;
	}
	if (wine_path.is_empty()) {
		wine_path = "wine"; 
	}
#endif
	String icon_path = ProjectSettings::get_singleton()->globalize_path(p_preset->get("application/icon"));
	if (p_console_icon) {
		String console_icon_path = ProjectSettings::get_singleton()->globalize_path(p_preset->get("application/console_wrapper_icon"));
		if (!console_icon_path.is_empty() && FileAccess::exists(console_icon_path)) {
			icon_path = console_icon_path;
		}
	}
	String tmp_icon_path = EditorPaths::get_singleton()->get_cache_dir().path_join("_rcedit.ico");
	if (!icon_path.is_empty()) {
		if (_process_icon(p_preset, icon_path, tmp_icon_path) != OK) {
			add_message(EXPORT_MESSAGE_WARNING, TTR("Resources Modification"), vformat(TTR("Invalid icon file \"%s\"."), icon_path));