Add the common module with XDS Retry functions

[hanbingleixue]

What type of PR is this?

Feature

What this PR does / why we need it?

Add the common module for the XDS flow control plugin

Which issue(s) this PR fixes？

Fixes #1515

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 45.13889% with 79 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...control/retry/SpringLbChooseServerInterceptor.java	25.00%	11 Missing and 1 partial ⚠️
...ds/retry/condition/ConnectErrorRetryCondition.java	8.33%	11 Missing ⚠️
...flowcontrol/common/handler/retry/RetryContext.java	23.07%	10 Missing ⚠️
...ommon/xds/retry/condition/ResetErrorCondition.java	9.09%	10 Missing ⚠️
...ndition/SpecificHeaderNameErrorRetryCondition.java	16.66%	10 Missing ⚠️
...rol/retry/SpringRibbonChooseServerInterceptor.java	64.70%	3 Missing and 3 partials ⚠️
...mmon/xds/retry/condition/ClientErrorCondition.java	20.00%	4 Missing ⚠️
...mmon/xds/retry/condition/ServerErrorCondition.java	20.00%	4 Missing ⚠️
...control/common/handler/AbstractRequestHandler.java	25.00%	3 Missing ⚠️
...ndition/SpecificStatusCodeErrorRetryCondition.java	40.00%	3 Missing ⚠️
... and 4 more

Flag	Coverage Δ	Complexity Δ
unittests	43.84% <45.13%> (-0.03%)	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/core/ext/ExternalAgentManager.java	46.93% <ø> (ø)	0.00 <0.00> (ø)
...ermant/flowcontrol/common/handler/retry/Retry.java	100.00% <100.00%> (ø)	0.00 <0.00> (ø)
...mon/handler/retry/policy/RetryOnUntriedPolicy.java	100.00% <100.00%> (ø)	0.00 <0.00> (?)
...mant/flowcontrol/retry/HttpRequestInterceptor.java	47.67% <ø> (ø)	0.00 <0.00> (ø)
...mant/flowcontrol/retry/handler/RetryHandlerV2.java	66.66% <ø> (ø)	0.00 <0.00> (ø)
...ant/flowcontrol/res4j/handler/BulkheadHandler.java	100.00% <ø> (ø)	0.00 <0.00> (ø)
...owcontrol/res4j/handler/CircuitBreakerHandler.java	80.48% <ø> (ø)	0.00 <0.00> (ø)
...ermant/flowcontrol/res4j/handler/FaultHandler.java	100.00% <ø> (ø)	0.00 <0.00> (ø)
...flowcontrol/res4j/handler/RateLimitingHandler.java	100.00% <ø> (ø)	0.00 <0.00> (ø)
...t/flowcontrol/res4j/handler/SystemRuleHandler.java	100.00% <ø> (ø)	0.00 <0.00> (ø)
... and 14 more