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

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[sonarqubecloud]

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.
✅ Project coverage is 69.49%. Comparing base (43e513d) to head (0385da8).
⚠️ Report is 491 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     

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