### 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
// Create a DMG.
			= OK) {
				if (ep.step(TTR("Making DMG"), 3)) {
					return ERR_SKIP;
				}
				err = _create_dmg(p_path, pkg_name, tmp_base_path_name);
			}
			// Sign DMG.
			= OK && sign_enabled && !ad_hoc) {
				if (ep.step(TTR("Code signing DMG"), 3)) {
					return ERR_SKIP;
				}
				err = _code_sign(p_preset, p_path, ent_path, false);
			}
		} else if (export_format == "zip") {
			// Create ZIP.
			= OK) {
				if (ep.step(TTR("Making ZIP"), 3)) {
					return ERR_SKIP;
				}
				if (FileAccess::exists(p_path)) {
					OS::get_singleton()->move_to_trash(p_path);
				}
				Ref<FileAccess> io_fa_dst;
				zlib_filefunc_def io_dst = zipio_create_io(&io_fa_dst);
				zipFile zip = zipOpen2(p_path.utf8().get_data(), APPEND_STATUS_CREATE, nullptr, &io_dst);
				zip_folder_recursive(zip, tmp_base_path_name, "", pkg_name);
				zipClose(zip, nullptr);
			}
		}