[Unit Test] Use matrix build workflow & Add Integration Test

[AlbumenJ]

What is the purpose of the change

• Use matrix build workflow
• remove 3rd party step dependency due to apache limit
• add integration test base on dubbo-samples

[codecov-io]

Codecov Report

Merging #7078 (8e509bf) into master (70b6fb3) will increase coverage by 1.03%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #7078      +/-   ##
============================================
+ Coverage     59.22%   60.25%   +1.03%     
+ Complexity      508      507       -1     
============================================
  Files          1028     1028              
  Lines         41525    41531       +6     
  Branches       6038     6038              
============================================
+ Hits          24593    25025     +432     
+ Misses        14169    13754     -415     
+ Partials       2763     2752      -11     

Impacted Files	Coverage Δ	Complexity Δ
.../apache/dubbo/remoting/transport/AbstractPeer.java	58.69% <0.00%> (-4.35%)	0.00% <0.00%> (ø%)
...pache/dubbo/remoting/transport/AbstractServer.java	53.75% <0.00%> (-3.75%)	0.00% <0.00%> (ø%)
...e/dubbo/remoting/transport/netty/NettyChannel.java	52.27% <0.00%> (-3.41%)	19.00% <0.00%> (-1.00%)
.../src/main/java/org/apache/dubbo/rpc/RpcStatus.java	71.42% <0.00%> (-1.20%)	0.00% <0.00%> (ø%)
...pache/dubbo/registry/support/AbstractRegistry.java	79.62% <0.00%> (-1.12%)	0.00% <0.00%> (ø%)
...a/org/apache/dubbo/monitor/dubbo/DubboMonitor.java	88.57% <0.00%> (-0.96%)	16.00% <0.00%> (-1.00%)
...figcenter/file/FileSystemDynamicConfiguration.java	62.38% <0.00%> (-0.48%)	0.00% <0.00%> (ø%)
...ava/org/apache/dubbo/common/utils/MemberUtils.java	0.00% <0.00%> (ø)	0.00% <0.00%> (ø%)
...apache/dubbo/common/extension/ExtensionLoader.java	75.56% <0.00%> (ø)	0.00% <0.00%> (ø%)
...mon/src/main/java/org/apache/dubbo/common/URL.java	48.95% <0.00%> (+0.10%)	0.00% <0.00%> (ø%)
... and 47 more

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[kylixs]

Good job!