fix: Negative finishCpu causes stats reporting to fail (#26587)

Summary:
finishCpu += operator.getFinishCpu().roundTo(NANOSECONDS);

getFinishCpu has underlying issue that causes finisheCpu to overflow
thus resulting in a negative result. This causes exception while
reporting query completion event leading to stats not being reported.
Fix it by setting finishCpu to max value when it overflows


# Release Note
```
== NO RELEASE NOTE ==
```

Author: han-yan01

presto-main-base/src/main/java/com/facebook/presto/operator/OperatorStats.java

@@ -885,7 +885,9 @@ else if (info != null && info.getClass() == base.getClass()) {
             nullJoinProbeKeyCount += operator.getNullJoinProbeKeyCount();
             joinProbeKeyCount += operator.getJoinProbeKeyCount();
         }
-
+        if (finishCpu < 0) {
+            finishCpu = Long.MAX_VALUE;
+        }
         return Optional.of(new OperatorStats(
                 stageId,
                 stageExecutionId,