### Godot version

4.0.3

### System information

Windows 10

### Issue description

When loading files from a `pck` generated by Godot, file paths must match the exact string path that they were packed in.

Usually when loading files using `FileAccess`, redundant `/`s will be handled correctly. For example, `res://my//path////here` will resolve to `res://my/path/here`. This is not true for `pck`s.

---

Assuming the default `icon.svg` file has been moved into a new directory at `res://assets/`

```gdscript
# This is valid
FileAccess.open("res://assets/icon.svg", FileAccess.READ)
# This is also valid
FileAccess.open("res://assets//////icon.svg", FileAccess.READ)
```

When loading from a `pck`, the path must match exactly.

```gdscript
var packer := PCKPacker.new()
packer.pck_start("res://test.pck")
packer.add_file("res://my//path/icon.svg", "res://assets/icon.svg")
packer.flush()

ProjectSettings.load_resource_pack("res://test.pck")

# This is valid
FileAccess.open("res://my//path/icon.svg", FileAccess.READ)

# This is not valid
FileAccess.open("res://my/path/icon.svg", FileAccess.READ)
# This is also not valid
FileAccess.open("res://my//path/////icon.svg", FileAccess.READ)
```

### Steps to reproduce

Create a `pck` file and start adding files.

Load the `pck` and try to access files with redundant `/`s (or with the correct number of `/`s, if the files were added with redundant `/`s).

### Minimal reproduction project

Available as a repo here: https://github.com/you-win/pck-loading-inconsistency

Available as a zip:
[pck_loading_inconsistency.zip](https://github.com/godotengine/godot/files/11525206/pck_loading_inconsistency.zip)

int pad = _get_pad(alignment, ofs + _size);
	ofs = ofs + _size + pad;
	files.push_back(pf);
	return OK;
}
Error PCKPacker::flush(bool p_verbose) {
	ERR_FAIL_COND_V_MSG(file.is_null(), ERR_INVALID_PARAMETER, "File must be opened before use.");
	int64_t file_base_ofs = file->get_position();
	file->store_64(0); 
	for (int i = 0; i < 16; i++) {
		file->store_32(0); 
	}
	
	file->store_32(files.size());
	Ref<FileAccessEncrypted> fae;
	Ref<FileAccess> fhead = file;
	if (enc_dir) {
		fae.instantiate();
		ERR_FAIL_COND_V(fae.is_null(), ERR_CANT_CREATE);
		Error err = fae->open_and_parse(file, key, FileAccessEncrypted::MODE_WRITE_AES256, false);
		ERR_FAIL_COND_V(err != OK, ERR_CANT_CREATE);
		fhead = fae;
	}
	for (int i = 0; i < files.size(); i++) {
		int string_len = files[i].path.utf8().length();
		int pad = _get_pad(4, string_len);
		fhead->store_32(string_len + pad);
		fhead->store_buffer((const uint8_t *)files[i].path.utf8().get_data(), string_len);
		for (int j = 0; j < pad; j++) {
			fhead->store_8(0);