### 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.
CHECK(String("Sub").is_subsequence_ofn(a));
}
TEST_CASE("[String] match") {
	CHECK(String("img1.png").match("*.png"));
	CHECK(!String("img1.jpeg").match("*.png"));
	CHECK(!String("img1.Png").match("*.png"));
	CHECK(String("img1.Png").matchn("*.png"));
}
TEST_CASE("[String] IPVX address to string") {
	IPAddress ip0("2001:0db8:85a3:0000:0000:8a2e:0370:7334");
	IPAddress ip(0x0123, 0x4567, 0x89ab, 0xcdef, true);
	IPAddress ip2("fe80::52e5:49ff:fe93:1baf");
	IPAddress ip3("::ffff:192.168.0.1");
	String ip4 = "192.168.0.1";
	CHECK(ip4.is_valid_ip_address());
	ip4 = "192.368.0.1";
	CHECK(!ip4.is_valid_ip_address());
	String ip6 = "2001:0db8:85a3:0000:0000:8a2e:0370:7334";
	CHECK(ip6.is_valid_ip_address());
	ip6 = "2001:0db8:85j3:0000:0000:8a2e:0370:7334";
	CHECK(!ip6.is_valid_ip_address());
	ip6 = "2001:0db8:85f345:0000:0000:8a2e:0370:7334";
	CHECK(!ip6.is_valid_ip_address());
	ip6 = "2001:0db8::0:8a2e:370:7334";
	CHECK(ip6.is_valid_ip_address());
	ip6 = "::ffff:192.168.0.1";
	CHECK(ip6.is_valid_ip_address());
}
TEST_CASE("[String] Capitalize against many strings") {
	String input = "2D";