### 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
static const uint8_t icon_size[] = { 16, 32, 48, 64, 128, 0  };
	struct IconData {
		Vector<uint8_t> data;
		uint8_t pal_colors = 0;
		uint16_t planes = 0;
		uint16_t bpp = 32;
	};
	HashMap<uint8_t, IconData> images;
	Error err;
	if (p_src_path.get_extension() == "ico") {
		Ref<FileAccess> f = FileAccess::open(p_src_path, FileAccess::READ, &err);
		if (err != OK) {
			return err;
		}
		
		f->get_16(); 
		uint16_t icon_type = f->get_16(); 
		uint16_t icon_count = f->get_16(); 
		ERR_FAIL_COND_V(icon_type != 1, ERR_CANT_OPEN);
		for (uint16_t i = 0; i < icon_count; i++) {
			
			uint16_t w = f->get_8(); 
			uint16_t h = f->get_8(); 
			uint8_t pal_colors = f->get_8(); 
			f->get_8(); 
			uint16_t planes = f->get_16(); 
			uint16_t bpp = f->get_16(); 
			uint32_t img_size = f->get_32(); 
			uint32_t img_offset = f->get_32(); 
			if (w != h) {