### 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(0x28);
		section_table_pos = f->get_64();
		f->seek(0x3c);
	}
	int num_sections = f->get_16();
	int string_section_idx = f->get_16();
	
	uint8_t *strings;
	{
		
		f->seek(section_table_pos + string_section_idx * section_header_size);
		
		int64_t string_data_pos;
		int64_t string_data_size;
		if (bits == 32) {
			f->seek(f->get_position() + 0x10);
			string_data_pos = f->get_32();
			string_data_size = f->get_32();
		} else { 
			f->seek(f->get_position() + 0x18);
			string_data_pos = f->get_64();
			string_data_size = f->get_64();
		}
		
		f->seek(string_data_pos);
		strings = (uint8_t *)memalloc(string_data_size);
		if (!strings) {
			return ERR_OUT_OF_MEMORY;
		}
		f->get_buffer(strings, string_data_size);