De-duplicate the filter returned by the getActivateExtension method

[xiaoheng1]

What is the purpose of the change

De-duplicate the filter returned by the getActivateExtension method

see more detail from fix #7587

Brief changelog

Verifying this change

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[codecov-commenter]

Codecov Report

Merging #7600 (ff41121) into master (c8d176f) will increase coverage by 0.37%.
The diff coverage is 80.00%.

@@             Coverage Diff              @@
##             master    #7600      +/-   ##
============================================
+ Coverage     60.47%   60.85%   +0.37%     
- Complexity      456      491      +35     
============================================
  Files          1090     1090              
  Lines         43937    43952      +15     
  Branches       6420     6423       +3     
============================================
+ Hits          26571    26747     +176     
+ Misses        14402    14230     -172     
- Partials       2964     2975      +11     

Impacted Files	Coverage Δ
...apache/dubbo/common/extension/ExtensionLoader.java	80.81% <80.00%> (-0.47%)	⬇️
.../apache/dubbo/rpc/protocol/AsyncToSyncInvoker.java	62.06% <0.00%> (-10.35%)	⬇️
...port/identifier/BaseServiceMetadataIdentifier.java	53.57% <0.00%> (-7.15%)	⬇️
...ng/transport/dispatcher/all/AllChannelHandler.java	82.75% <0.00%> (-6.90%)	⬇️
...a/org/apache/dubbo/monitor/dubbo/DubboMonitor.java	86.66% <0.00%> (-1.91%)	⬇️
.../src/main/java/org/apache/dubbo/rpc/RpcStatus.java	72.61% <0.00%> (-1.20%)	⬇️
...pache/dubbo/registry/support/AbstractRegistry.java	75.92% <0.00%> (-0.75%)	⬇️
.../apache/dubbo/config/bootstrap/DubboBootstrap.java	54.41% <0.00%> (-0.16%)	⬇️
...n/java/org/apache/dubbo/common/utils/NetUtils.java	69.30% <0.00%> (+0.33%)	⬆️
...rg/apache/dubbo/common/timer/HashedWheelTimer.java	79.72% <0.00%> (+0.34%)	⬆️
... and 26 more

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[AlbumenJ]

Shall we notify users that there contains two extension have the same name by loggeer?

[xiaoheng1]

Shall we notify users that there contains two extension have the same name by loggeer?

If just print the log, the user also needs to remove it manually, and may also ignore this log.
If the system supports filtering, it will be easier for users to use.

[AlbumenJ]

Shall we notify users that there contains two extension have the same name by loggeer?

If just print the log, the user also needs to remove it manually, and may also ignore this log.
If the system supports filtering, it will be easier for users to use.

Filter those duplicated and log out to notify that has been filtered.

[xiaoheng1]

Filter those duplicated and log out to notify that has been filtered.

Sorry, I misunderstand. Now let’s add a log.