optimize: the handling logic of PathAndInvokerMapper

[funky-eyes]

What is the purpose of the change

Brief changelog

Verifying this change

Checklist

• Make sure there is a GitHub_issue field for the change (usually before you start working on it). Trivial changes like typos do not require a GitHub issue. Your pull request should address just this issue, without pulling in other changes - one PR resolves one issue.
• Each commit in the pull request should have a meaningful subject line and body.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Check if is necessary to patch to Dubbo 3 if you are work on Dubbo 2.7
• Write necessary unit-test to verify your logic correction, more mock a little better when cross module dependency exist. If the new feature or significant change is committed, please remember to add sample in dubbo samples project.
• Add some description to dubbo-website project if you are requesting to add a feature.
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[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.15%. Comparing base (3e53e32) to head (6c20645).
Report is 62 commits behind head on 3.2.

Additional details and impacted files

@@            Coverage Diff             @@
##              3.2   #14534      +/-   ##
==========================================
+ Coverage   70.11%   70.15%   +0.03%     
==========================================
  Files        1607     1608       +1     
  Lines       70192    70232      +40     
  Branches    10116    10123       +7     
==========================================
+ Hits        49213    49268      +55     
+ Misses      16324    16315       -9     
+ Partials     4655     4649       -6     

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