Optimize configuration management services

[hanbingleixue]

What type of PR is this?

Enhancement

What this PR does / why we need it?

1. Modify configuration query interface

2. Modify the configuration details page and render according to the configuration template
   
   

3. Add a configuration template query interface

Which issue(s) this PR fixes？

Fixes #1622

Does this PR introduce a user-facing change?

No

Checklist

• Make sure there is a GitHub_issue related with this PR before you start working on it.
• Make sure you have squashed your change to one single commit.
• GitHub Actions works fine in this PR.

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 144 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...java/io/sermant/backend/service/ConfigService.java	51.42%	22 Missing and 12 partials ⚠️
...o/sermant/backend/service/PageTemplateService.java	0.00%	29 Missing ⚠️
.../sermant/backend/yaml/FieldMappingConstructor.java	0.00%	18 Missing ⚠️
.../java/io/sermant/backend/yaml/YamlRepresenter.java	0.00%	10 Missing ⚠️
...va/io/sermant/backend/entity/template/Element.java	0.00%	9 Missing ⚠️
...rvice/dynamicconfig/zookeeper/ZooKeeperClient.java	12.50%	7 Missing ⚠️
...a/io/sermant/backend/entity/config/ConfigInfo.java	77.77%	3 Missing and 3 partials ⚠️
...ervice/dynamicconfig/kie/client/kie/KieClient.java	0.00%	5 Missing ⚠️
...mant/backend/entity/template/PageTemplateInfo.java	28.57%	5 Missing ⚠️
...ermant/backend/entity/template/ConfigTemplate.java	0.00%	4 Missing ⚠️
... and 6 more

Flag	Coverage Δ	Complexity Δ
unittests	43.79% <33.33%> (-0.37%)	182.00 <0.00> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ	Complexity Δ
...va/io/sermant/backend/common/conf/CommonConst.java	0.00% <ø> (ø)	0.00 <0.00> (ø)
.../java/io/sermant/backend/entity/config/Result.java	95.65% <100.00%> (+1.20%)	0.00 <0.00> (ø)
.../io/sermant/backend/common/conf/DynamicConfig.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...ant/backend/controller/PageTemplateController.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...o/sermant/backend/controller/ConfigController.java	44.11% <70.00%> (-1.83%)	0.00 <0.00> (ø)
...ava/io/sermant/backend/entity/template/Option.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...ermant/backend/entity/template/ConfigTemplate.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...o/sermant/backend/entity/template/Description.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
.../java/io/sermant/backend/entity/template/Name.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...ervice/dynamicconfig/kie/client/kie/KieClient.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
... and 8 more

... and 91 files with indirect coverage changes