[plugin]support log4j2 AsyncLogger

[xiaoy00]

Please answer these questions before submitting pull request

• Why submit this pull request?

• [1 ] Bug fix

• New feature provided

• Improve performance

• Related issues

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Bug fix

• Bug description.
  there are 2 ways to implement Async log. but now this plugin just 1. so if i use Log4jContextSelector=org.apache.logging.log4j.core.async.AsyncLoggerContextSelector
  to set async log . plugin doesn't work.

• How to fix?
  intercept RingBufferLogEvent.setMessage(), i can get traceId,then its ok.

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New feature or improvement

• Describe the details and related test reports.

[xiaoy00]

/run agent-plugin-test-1

[wu-sheng]

Could you update the document? And post the log when it actives?

[wu-sheng]

@zhaoyuguang Could you check this locally?

[zhaoyuguang]

I have tested locally that the log print TID is normal. So this pr is LGTM.

[enoch1024]

@wu-sheng @zhaoyuguang When I use Log4jContextSelector=org.apache.logging.log4j.core.async.AsyncLoggerContextSelector
to set async log , plugin still doesn't work. I think it's similar to this #6815

[wu-sheng]

@wu-sheng @zhaoyuguang When I use Log4jContextSelector=org.apache.logging.log4j.core.async.AsyncLoggerContextSelector
to set async log , plugin still doesn't work. I think it's similar to this #6815

There is no chance async logger could work. Unless we hijack the log#debug by using the agent plugin mechanism.