Support Quasar fiber tracing

[zhaoyuguang]

Please answer these questions before submitting pull request

• Why submit this pull request?

• Bug fix

• New feature provided

• Improve performance

• Related issues
  Support Quasar fiber tracing #4950

[codecov]

Codecov Report

Merging #4951 into master will decrease coverage by 0.01%.
The diff coverage is 6.25%.

@@             Coverage Diff              @@
##             master    #4951      +/-   ##
============================================
- Coverage     51.32%   51.30%   -0.02%     
+ Complexity     2747     2746       -1     
============================================
  Files          1354     1355       +1     
  Lines         29476    29492      +16     
  Branches       3257     3259       +2     
============================================
+ Hits          15128    15131       +3     
- Misses        13624    13637      +13     
  Partials        724      724              

Impacted Files	Coverage Δ	Complexity Δ
...skywalking/apm/plugin/quasar/FiberInterceptor.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
.../apm/network/trace/component/ComponentsDefine.java	98.57% <100.00%> (+0.02%)	1.00 <0.00> (ø)
.../agent/core/context/trace/AbstractTracingSpan.java	65.42% <0.00%> (-0.94%)	13.00% <0.00%> (ø%)
...ng/oap/server/core/alarm/provider/RunningRule.java	77.60% <0.00%> (+0.52%)	10.00% <0.00%> (ø%)
...core/analysis/manual/instance/InstanceTraffic.java	58.00% <0.00%> (+4.00%)	7.00% <0.00%> (ø%)

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[wu-sheng]

Guasar Fiber is not an async bridge?

[zhaoyuguang]

Yes, main thread is Http entry, async is Fiber and http exit