### 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
continue; // next
		}
		ile == "Contents/Info.plist") {
			_fix_plist(p_preset, data, pkg_name);
		}
		ile.begins_with("Contents/MacOS/godot_")) {
			ile != "Contents/MacOS/" + binary_to_use) {
				ret = unzGoToNextFile(src_pkg_zip);
				continue; // skip
			}
			d_binary = true;
			file = "Contents/MacOS/" + pkg_name;
		}
		ile == "Contents/Resources/icon.icns") {
			// See if there is an icon.
			String iconpath;
			if (p_preset->get("application/icon") != "") {
				iconpath = p_preset->get("application/icon");
			} else {
				iconpath = GLOBAL_GET("application/config/icon");
			}
			if (!iconpath.is_empty()) {
				if (iconpath.get_extension() == "icns") {
					Ref<FileAccess> icon = FileAccess::open(iconpath, FileAccess::READ);
					if (icon.is_valid()) {
						data.resize(icon->get_length());
						icon->get_buffer(&data.write[0], icon->get_length());
					}
				} else {
					Ref<Image> icon;