### 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
f->seek(header_pos + 16);
		uint16_t opt_header_size = f->get_16();
		
		f->seek(f->get_position() + 2 + opt_header_size);
	}
	
	int64_t section_table_pos = f->get_position();
	bool found = false;
	for (int i = 0; i < num_sections; ++i) {
		int64_t section_header_pos = section_table_pos + i * 40;
		f->seek(section_header_pos);
		uint8_t section_name[9];
		f->get_buffer(section_name, 8);
		section_name[8] = '\0';
		if (strcmp((char *)section_name, "pck") == 0) {
			
			
			f->seek(section_header_pos + 8);
			f->store_32(8);
			f->seek(section_header_pos + 16);
			f->store_32(p_embedded_size);
			f->seek(section_header_pos + 20);
			f->store_32(p_embedded_start);
			found = true;
			break;
		}
	}
	if (!found) {
		add_message(EXPORT_MESSAGE_ERROR, TTR("PCK Embedding"), TTR("Executable \"pck\" section not found."));
		return ERR_FILE_CORRUPT;