`io.kubernetes.client.custom.Quantity` doesn't implement `hashCode`

[nulls]

Describe the bug
io.kubernetes.client.custom.Quantity has overridden equals, but a default one for hashCode. It leads to problem with comparing set of io.kubernetes.client.custom.Quantity

Client Version
20.0.1

To Reproduce

import io.kubernetes.client.custom.Quantity;

import java.util.List;
import java.util.Objects;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.Stream;

class Scratch {
    public static void main(String[] args) {
        final List<Quantity> quantityList1 = Stream.of(
                Quantity.fromString("200Mi"), Quantity.fromString("300Mi")
        ).toList();
        final List<Quantity> quantityList2 = Stream.of(
                Quantity.fromString("200Mi"), Quantity.fromString("300Mi")
        ).toList();
        System.out.println("Comparing as lists: " + Objects.equals(quantityList1, quantityList2)); // true here

        final Set<Quantity> quantitySet1 = Stream.of(
                Quantity.fromString("200Mi"), Quantity.fromString("300Mi")
        ).collect(Collectors.toSet());
        final Set<Quantity> quantitySet2 = Stream.of(
                Quantity.fromString("200Mi"), Quantity.fromString("300Mi")
        ).collect(Collectors.toSet());
        System.out.println("Comparing as sets: " + Objects.equals(quantitySet1, quantitySet2)); // false here
    }
}

Expected behavior
Equals with set of Quantity passes