Clear the container at the end of the DefaultExecutorRepository#destroyAll method

[BurningCN]

Clear the container at the end of the DefaultExecutorRepository#destroyAll method

Reuse destroyRegistered variable

[codecov-commenter]

Codecov Report

Merging #7820 (ede388d) into master (e845e16) will decrease coverage by 0.18%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master    #7820      +/-   ##
============================================
- Coverage     59.28%   59.10%   -0.19%     
- Complexity      529      555      +26     
============================================
  Files          1077     1086       +9     
  Lines         43565    43754     +189     
  Branches       6368     6358      -10     
============================================
+ Hits          25826    25859      +33     
- Misses        14879    15027     +148     
- Partials       2860     2868       +8     

Impacted Files	Coverage Δ	Complexity Δ
.../threadpool/manager/DefaultExecutorRepository.java	80.95% <100.00%> (-4.54%)	0.00 <0.00> (ø)
...pache/dubbo/registry/support/AbstractRegistry.java	76.66% <100.00%> (-1.49%)	0.00 <0.00> (ø)
...a/org/apache/dubbo/rpc/filter/AccessLogFilter.java	28.35% <0.00%> (-50.75%)	0.00% <0.00%> (ø%)
...va/org/apache/dubbo/rpc/support/AccessLogData.java	53.16% <0.00%> (-37.98%)	0.00% <0.00%> (ø%)
...ng/transport/dispatcher/all/AllChannelHandler.java	68.96% <0.00%> (-20.69%)	0.00% <0.00%> (ø%)
...ng/transport/dispatcher/WrappedChannelHandler.java	43.47% <0.00%> (-19.57%)	0.00% <0.00%> (ø%)
...bo/rpc/cluster/support/FailbackClusterInvoker.java	52.45% <0.00%> (-18.04%)	0.00% <0.00%> (ø%)
...rg/apache/dubbo/remoting/utils/PayloadDropper.java	76.92% <0.00%> (-15.39%)	0.00% <0.00%> (ø%)
...dubbo/common/status/support/LoadStatusChecker.java	50.00% <0.00%> (-11.54%)	0.00% <0.00%> (ø%)
...in/java/org/apache/dubbo/common/utils/JVMUtil.java	81.13% <0.00%> (-11.33%)	0.00% <0.00%> (ø%)
... and 97 more

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