### Godot version

v4.1.stable.official [970459615]

### System information

Windows 11

### Issue description

Using `String::pad_zeros` on a string containing digits with greater length than the argument `digits` raises the error `Parameter count should be a positive number.` of `String::repeat`, because it is called with a negative parameter.
(Actually this error is not 100% correct, it should be non-negative)

4.0 Code:
https://github.com/godotengine/godot/blob/c8e0bd50c57de91c061866db1de407f2e7a74acd/core/string/ustring.cpp#L4127-L4155

Example: `"2023".pad_zeros(2)`
`begin == 0`
`end == 4`
`end - begin < p_digits == false` => No "0" is inserted, the string is returned unchanged.

4.1 Code:
https://github.com/godotengine/godot/blob/ce5c6151fc498b39fe0c188045a4685e0f627854/core/string/ustring.cpp#L4266-L4290

Example: `"2023".pad_zeros(2)`
`begin == 0`
`end == 4`
`zeros_to_add == 2 - (4 - 0) == -2`
=> `s.insert(0, String("0").repeat(-2))` is called => Error.

I don't know why this was changed, but I think ensuring that `zeros_to_add > 0` should be ensured internally and not by the user. If this condition is not fullfilled the string should be returned unchanged as in the 4.0 implementation.

### Steps to reproduce

Try my above mentioned example in 4.0 and 4.1

### Minimal reproduction project

Not necessary.
bool ::match(const  &p_wildcard) const {
	if (!p_wildcard.length() || !length()) {
		return false;
	}
	return _wildcard_match(p_wildcard.get_data(), get_data(), true);
}
bool ::matchn(const  &p_wildcard) const {
	if (!p_wildcard.length() || !length()) {
		return false;
	}
	return _wildcard_match(p_wildcard.get_data(), get_data(), false);
}
 ::format(const Variant &values,  placeholder) const {
	 new_string = (this->ptr());
	if (values.get_type() == Variant::ARRAY) {
		Array values_arr = values;
		for (int i = 0; i < values_arr.size(); i++) {
			 i_as_str = ::num_int64(i);
			if (values_arr[i].get_type() == Variant::ARRAY) { //
				Array value_arr = values_arr[i];
				if (value_arr.size() == 2) {
					Variant v_key = value_arr[0];
					 key = v_key;
					Variant v_val = value_arr[1];
					 val = v_val;
					new_string = new_string.replace(placeholder.replace("_", key), val);
				} else {
					ERR_PRINT(("STRING.format Inner Array size != 2 ").ascii().get_data());
				}
			} else { //