test: provide Micrometer histogram bounds in no-SLA test

Micrometer requires valid expected histogram bounds even when SLA buckets are disabled. Stub the lowest, highest, and precision options in the no-SLA session metric test so it exercises the intended branch instead of failing while constructing the distribution configuration.

Author: dkropachev

metrics/micrometer/src/test/java/com/datastax/oss/driver/internal/metrics/micrometer/MicrometerSessionMetricUpdaterTest.java

@@ -132,6 +132,9 @@ public void should_not_create_sla_percentiles(
     when(context.getMetricIdGenerator()).thenReturn(generator);
     when(profile.getDuration(DefaultDriverOption.METRICS_NODE_EXPIRE_AFTER))
         .thenReturn(Duration.ofHours(1));
+    when(profile.getDuration(lowest)).thenReturn(Duration.ofMillis(10));
+    when(profile.getDuration(highest)).thenReturn(Duration.ofSeconds(1));
+    when(profile.getInt(digits)).thenReturn(5);
     when(profile.isDefined(sla)).thenReturn(false);
     when(profile.getDurationList(sla))
         .thenReturn(Arrays.asList(Duration.ofMillis(100), Duration.ofMillis(500)));