MeterRegistry#removeByPreFilterId returns null when multiple pre-filter IDs map to same ID

[shakuzen]

The following test demonstrates the issue and fails currently. It would pass if the tag value in the pre-filter ID were value instead because that is what is in the preFilterIdToMeterMap because it was registered first.

@Test
void multiplePreFilterIdsMapToSameId_removeByPreFilterId() {
    registry.config().meterFilter(MeterFilter.replaceTagValues("secret", s -> "redacted"));
    Counter c1 = registry.counter("counter", "secret", "value");
    Counter c2 = registry.counter("counter", "secret", "value2");

    Meter.Id preFilterId = new Meter.Id("counter", Tags.of("secret", "value2"), null, null, Meter.Type.COUNTER);
    assertThat(registry.removeByPreFilterId(preFilterId)).isSameAs(c1).isSameAs(c2);
    assertThat(registry.getMeters()).isEmpty();
}