Portal-UI adds serverconfig configuration management of ApolloConfigDB

[klboke]

What's the purpose of this PR

Portal-UI adds serverconfig configuration management of ApolloConfigDB

Some functional features

• Switch PortalDB, ConfigDB configuration management through tabs
• When editing and adding configurations, it is forbidden to switch tabs
• ConfigDB's configuration management supports switching environments

[codecov]

Codecov Report

Merging #4680 (99fc20b) into master (7df79bf) will increase coverage by 0.08%.
The diff coverage is 70.21%.

@@             Coverage Diff              @@
##             master    #4680      +/-   ##
============================================
+ Coverage     47.12%   47.21%   +0.08%     
- Complexity     1646     1656      +10     
============================================
  Files           347      349       +2     
  Lines         10660    10691      +31     
  Branches       1060     1062       +2     
============================================
+ Hits           5024     5048      +24     
- Misses         5331     5336       +5     
- Partials        305      307       +2     

Impacted Files	Coverage Δ
...p/framework/apollo/portal/api/AdminServiceAPI.java	13.19% <25.00%> (+0.24%)	⬆️
...ork/apollo/portal/service/ServerConfigService.java	50.00% <50.00%> (-10.00%)	⬇️
...ollo/portal/controller/ServerConfigController.java	85.71% <80.00%> (+15.12%)	⬆️
...mework/apollo/biz/service/ServerConfigService.java	93.33% <93.33%> (ø)
...dminservice/controller/ServerConfigController.java	100.00% <100.00%> (ø)
...ervice/service/ReleaseMessageServiceWithCache.java	84.70% <0.00%> (-1.18%)	⬇️
...trip/framework/apollo/biz/entity/ServerConfig.java	92.85% <0.00%> (+21.42%)	⬆️

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[nobodyiam]

Looks great!