SslServerTlsHandler#decode early return

[manzhizhen]

…ode should remove and return instead of printing the error log.

What is the purpose of the change

When I read part of the Dubbo netty4 source code, I found SslServerTlsHandler#decode method in dealing with "providerConnectionConfig.getAuthPolicy() == AuthPolicy.NONE" not timely return，
this will cause it to print the error log and close connection

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.
• GitHub Actions works fine on your own branch.
• If this contribution is large, please follow the Software Donation Guide.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

33.3% Coverage
0.0% Duplication

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (43e513d) 69.59% compared to head (0385da8) 69.49%.
Report is 38 commits behind head on 3.2.

Additional details and impacted files

@@             Coverage Diff              @@
##                3.2   #13468      +/-   ##
============================================
- Coverage     69.59%   69.49%   -0.10%     
  Complexity        2        2              
============================================
  Files          1653     1655       +2     
  Lines         71623    71700      +77     
  Branches      10269    10278       +9     
============================================
- Hits          49847    49830      -17     
- Misses        17083    17162      +79     
- Partials       4693     4708      +15     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.