### 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 src_len = p_size * p_size;
	Vector<uint8_t> result;
	result.resize(src_len * 1.25); 
	int res_size = 0;
	uint8_t buf[128];
	int buf_size = 0;
	int i = 0;
	while (i < src_len) {
		uint8_t cur = p_source.ptr()[i * 4 + p_ch];
		if (i < src_len - 2) {
			if ((p_source.ptr()[(i + 1) * 4 + p_ch] == cur) && (p_source.ptr()[(i + 2) * 4 + p_ch] == cur)) {
				if (buf_size > 0) {
					result.write[res_size++] = (uint8_t)(buf_size - 1);
					memcpy(&result.write[res_size], &buf, buf_size);
					res_size += buf_size;
					buf_size = 0;
				}
				uint8_t lim = i + 130 >= src_len ? src_len - i - 1 : 130;
				bool hit_lim = true;
				for (int j = 3; j <= lim; j++) {
					if (p_source.ptr()[(i + j) * 4 + p_ch] != cur) {
						hit_lim = false;
						i = i + j - 1;
						result.write[res_size++] = (uint8_t)(j - 3 + 0x80);
						result.write[res_size++] = cur;
						break;