Correctly configure percentile precision in MoreMeters (#4047)

Motivation:

While `MoreMeters.distStatCfg` specifies that Micrometer's default `percentilePrecision` is not accurate enough, the correct/better value is never actually used in `MoreMeters`.

Modifications:

- Set `percentilePrecision` in `newTimer()` and `newDistributionSummary()`

Result:

- Meters created by `MoreMeters` are now using more accurate percentiles

core/src/main/java/com/linecorp/armeria/common/metric/MoreMeters.java

@@ -106,6 +106,7 @@ public static DistributionSummary newDistributionSummary(MeterRegistry registry,
                                    .tags(tags)
                                    .publishPercentiles(distStatCfg.getPercentiles())
                                    .publishPercentileHistogram(distStatCfg.isPercentileHistogram())
+                                   .percentilePrecision(distStatCfg.getPercentilePrecision())
                                    .distributionStatisticBufferLength(distStatCfg.getBufferLength())
                                    .distributionStatisticExpiry(distStatCfg.getExpiry());
 
@@ -151,6 +152,7 @@ public static Timer newTimer(MeterRegistry registry, String name, Iterable<Tag>
                     .minimumExpectedValue(minExpectedValue)
                     .publishPercentiles(distStatCfg.getPercentiles())
                     .publishPercentileHistogram(distStatCfg.isPercentileHistogram())
+                    .percentilePrecision(distStatCfg.getPercentilePrecision())
                     .distributionStatisticBufferLength(distStatCfg.getBufferLength())
                     .distributionStatisticExpiry(distStatCfg.getExpiry())
                     .register(registry);