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  1. JDK
  2. JDK-8354555

Add generic JFR events for TaskTerminator

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      <WIP>

      Add generic JFR events TaskTerminator after a GC phase finishes, the JFR event should include multiple max/min/avg timings to for termination, as well as max/min/avg attempts, similar to the G1 termination log in Evac phase like:
      ```
      [2025-03-04T17:15:35.621-0800][1044855.394s][debug][gc,phases ] GC(52557) Termination (ms): Min: 0.1, Avg: 0.1, Max: 0.1, Diff: 0.0, Sum: 2.3, Workers: 25
      [2025-03-04T17:15:35.621-0800][1044855.394s][debug][gc,phases ] GC(52557) Termination Attempts: Min: 1, Avg: 1.0, Max: 1, Diff: 0, Sum: 25, Workers: 25

      ```

            xpeng Xiaolong Peng
            xpeng Xiaolong Peng
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