### 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.
}
	return res;
}
 ::uri_decode() const {
	Char src = utf8();
	Char res;
	for (int i = 0; i < src.length(); ++i) {
		if (src[i] == '%' && i + 2 < src.length()) {
			char ord1 = src[i + 1];
			if (is_digit(ord1) || is_ascii_upper_case(ord1)) {
				char ord2 = src[i + 2];
				if (is_digit(ord2) || is_ascii_upper_case(ord2)) {
					char bytes[3] = { (char)ord1, (char)ord2, 0 };
					res += (char)strtol(bytes, nullptr, 16);
					i += 2;
				}
			} else {
				res += src[i];
			}
		} else if (src[i] == '+') {
			res += ' ';
		} else {
			res += src[i];
		}
	}
	return ::utf8(res);
}
 ::c_unescape() const {
	 escaped = *this;
	escaped = escaped.replace("\\a", "\a");