### 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 p_text_plural;
}
/**
 * "Docs TRanslate". Used for the editor class reference documentation,
 * handling descriptions extracted from the XML.
 * It also replaces `$DOCS_URL` with the actual URL to the documentation's branch,
 * to allow dehardcoding it in the XML and doing proper substitutions everywhere.
 */
 DTR(const  &p_text, const  &p_context) {
	// 
	const  text = p_text.dedent().strip_edges();
	if (TranslationServer::get_singleton()) {
		return (TranslationServer::get_singleton()->doc_translate(text, p_context)).replace("$DOCS_URL", VERSION_DOCS_URL);
	}
	return text.replace("$DOCS_URL", VERSION_DOCS_URL);
}
/**
 * "Docs TRanslate for N items". Used for the editor class reference documentation
 * (with support for plurals), handling descriptions extracted from the XML.
 * It also replaces `$DOCS_URL` with the actual URL to the documentation's branch,
 * to allow dehardcoding it in the XML and doing proper substitutions everywhere.
 */
 DTRN(const  &p_text, const  &p_text_plural, int p_n, const  &p_context) {
	const  text = p_text.dedent().strip_edges();
	const  text_plural = p_text_plural.dedent().strip_edges();
	if (TranslationServer::get_singleton()) {
		return (TranslationServer::get_singleton()->doc_translate_plural(text, text_plural, p_n, p_context)).replace("$DOCS_URL", VERSION_DOCS_URL);
	}
	//