Add metric collection function to router plugin

[hanbingleixue]

What type of PR is this?

Enhancement

What this PR does / why we need it?

Add metric collection function to router plugin
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Which issue(s) this PR fixes？

Fixes #1655

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 19.20530% with 244 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...t/router/config/strategy/AbstractRuleStrategy.java	2.94%	32 Missing and 1 partial ⚠️
...o/sermant/router/common/metric/MetricsManager.java	39.53%	25 Missing and 1 partial ⚠️
...va/io/sermant/router/common/metric/MetricInfo.java	0.00%	19 Missing ⚠️
...erceptor/AlibabaDubboMonitorFilterInterceptor.java	0.00%	18 Missing ⚠️
...terceptor/ApacheDubboMonitorFilterInterceptor.java	0.00%	18 Missing ⚠️
...sermant/router/spring/handler/AbstractHandler.java	10.52%	16 Missing and 1 partial ⚠️
...ring/interceptor/HttpAsyncClient4xInterceptor.java	0.00%	17 Missing ⚠️
...eptor/OkHttpClientInterceptorChainInterceptor.java	30.00%	13 Missing and 1 partial ⚠️
...er/spring/interceptor/HttpClient4xInterceptor.java	0.00%	12 Missing ⚠️
...r/spring/interceptor/OkHttp3ClientInterceptor.java	0.00%	12 Missing ⚠️
... and 11 more

Flag	Coverage Δ	Complexity Δ
unittests	43.96% <19.20%> (-0.25%)	181.00 <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
.../java/io/sermant/router/common/cache/AppCache.java	100.00% <ø> (ø)	0.00 <0.00> (?)
...ermant/router/common/constants/RouterConstant.java	100.00% <ø> (ø)	0.00 <0.00> (ø)
...mant/router/spring/handler/LaneMappingHandler.java	89.47% <100.00%> (+0.58%)	0.00 <0.00> (ø)
...t/router/spring/handler/LaneRequestTagHandler.java	89.47% <100.00%> (+0.58%)	0.00 <0.00> (ø)
...pring/interceptor/DiscoveryManagerInterceptor.java	93.75% <ø> (ø)	0.00 <0.00> (ø)
...pring/interceptor/EurekaHttpClientInterceptor.java	91.66% <ø> (ø)	0.00 <0.00> (ø)
...spring/interceptor/ServiceRegistryInterceptor.java	84.21% <ø> (ø)	0.00 <0.00> (ø)
...sermant/router/spring/utils/SpringRouterUtils.java	25.92% <ø> (ø)	0.00 <0.00> (ø)
...ermant/router/spring/handler/FlowRouteHandler.java	82.35% <ø> (ø)	0.00 <0.00> (ø)
...sermant/router/spring/handler/TagRouteHandler.java	59.09% <ø> (ø)	0.00 <0.00> (ø)
... and 22 more

... and 4 files with indirect coverage changes