### 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
int size = (icon_size[i] == 0) ? 256 : icon_size[i];
			add_message(EXPORT_MESSAGE_WARNING, TTR("Resources Modification"), vformat(TTR("Icon size \"%d\" is missing."), size));
		}
	}
	ERR_FAIL_COND_V(valid_icon_count == 0, ERR_CANT_OPEN);
	Ref<FileAccess> fw = FileAccess::open(p_dst_path, FileAccess::WRITE, &err);
	if (err != OK) {
		return err;
	}
	
	fw->store_16(0); 
	fw->store_16(1); 
	fw->store_16(valid_icon_count); 
	
	uint32_t img_offset = 6 + 16 * valid_icon_count;
	for (size_t i = 0; i < sizeof(icon_size) / sizeof(icon_size[0]); ++i) {
		if (images.has(icon_size[i])) {
			const IconData &di = images[icon_size[i]];
			fw->store_8(icon_size[i]); 
			fw->store_8(icon_size[i]); 
			fw->store_8(di.pal_colors); 
			fw->store_8(0); 
			fw->store_16(di.planes); 
			fw->store_16(di.bpp); 
			fw->store_32(di.data.size()); 
			fw->store_32(img_offset); 
			img_offset += di.data.size();
		}
	}