### CI Link

https://gradle-enterprise.elastic.co/s/gcyi7azxnlpck/tests/:x-pack:plugin:autoscaling:test/org.elasticsearch.xpack.autoscaling.capacity.AutoscalingDeciderResultsTests/testRequiredCapacity

### Repro line

`./gradlew ':x-pack:plugin:autoscaling:test' --tests "org.elasticsearch.xpack.autoscaling.capacity.AutoscalingDeciderResultsTests.testRequiredCapacity" -Dtests.seed=2E2DFCE718729D4D -Dtests.locale=en-PH -Dtests.timezone=AST -Druntime.java=17`

### Does it reproduce?

Yes

### Applicable branches

main

### Failure history

https://gradle-enterprise.elastic.co/scans/tests?search.timeZoneId=Europe/Berlin&tests.container=org.elasticsearch.xpack.autoscaling.capacity.AutoscalingDeciderResultsTests&tests.test=testRequiredCapacity

### Failure excerpt

```
java.lang.IllegalArgumentException: processors must be a non-negative number; provided [0.0]
        at __randomizedtesting.SeedInfo.seed([2E2DFCE718729D4D:F14848089DDDD218]:0)
        at org.elasticsearch.common.unit.Processors.of(Processors.java:58)
        at org.elasticsearch.xpack.autoscaling.capacity.AutoscalingCapacity$Builder.total(AutoscalingCapacity.java:288)
        at org.elasticsearch.xpack.autoscaling.capacity.AutoscalingDeciderResultsTests.randomCapacity(AutoscalingDeciderResultsTests.java:161)
        at org.elasticsearch.xpack.autoscaling.capacity.AutoscalingDeciderResultsTests.lambda$testRequiredCapacity$1(AutoscalingDeciderResultsTests.java:65)
        at java.base/java.util.stream.IntPipeline$1$1.accept(IntPipeline.java:180)
        at java.base/java.util.stream.Streams$RangeIntSpliterator.forEachRemaining(Streams.java:104)
        at java.base/java.util.Spliterator$OfInt.forEachRemaining(Spliterator.java:711)
        at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
        at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
```
x-pack/plugin/autoscaling/src/test/java/org/elasticsearch/xpack/autoscaling/capacity/AutoscalingCalculateCapacityServiceTests.java
randomRoles(),
            new TreeMap<>(
                Map.of(FixedAutoscalingDeciderService.NAME, Settings.builder().put(badSettingName, randomAlphaOfLength(1)).build())
            )
        );
        IllegalArgumentException exception = expectThrows(IllegalArgumentException.class, () -> service.validate(policy));
        assertThat(
            exception.getMessage(),
            equalTo("unknown setting [" + badSettingName + "] for decider [" + FixedAutoscalingDeciderService.NAME + "]")
        );
    }
    public void testValidateSettingValue() {
        AutoscalingCalculateCapacityService service = new AutoscalingCalculateCapacityService(Set.of(new FixedAutoscalingDeciderService()));
        String value = randomValueOtherThanMany(s -> Character.isDigit(s.charAt(0)), () -> randomAlphaOfLength(5));
        AutoscalingPolicy policy = new AutoscalingPolicy(
            randomAlphaOfLength(8),
            randomRoles(),
            new TreeMap<>(
                Map.of(
                    FixedAutoscalingDeciderService.NAME,
                    Settings.builder().put(FixedAutoscalingDeciderService.STORAGE.getKey(), value).build()
                )
            )
        );
        IllegalArgumentException exception = expectThrows(IllegalArgumentException.class, () -> service.validate(policy));
        assertThat(exception.getMessage(), containsString("[" + value + "]"));
        assertThat(exception.getMessage(), containsString("[" + FixedAutoscalingDeciderService.STORAGE.getKey() + "]"));
    }
}