[#11768] Migrate TimerTaskDecorator to TaskDecorator

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.

Project coverage is 36.93%. Comparing base (afa69fa) to head (4f13e11). Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...avercorp/pinpoint/web/realtime/RealtimeConfig.java	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #11769 +/- ## ========================================= Coverage 36.93% 36.93% + Complexity 12409 12406 -3 ========================================= Files 4104 4104 Lines 100656 100656 Branches 10530 10530 ========================================= + Hits 37175 37178 +3 + Misses 60489 60483 -6 - Partials 2992 2995 +3 ```

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