Fix: decode net stream bytes as getty rule

[AlexStocks]

What this PR does:

the current dubbo-go do not follow the getty rule when decoding tcp network streams

Which issue(s) this PR fixes:
Fixes #

You should pay attention to items below to ensure your pr passes our ci test
We do not merge pr with ci tests failed

• All ut passed (run 'go test ./...' in project root)
• After go-fmt ed , run 'go fmt project' using goland.
• Golangci-lint passed, run 'sudo golangci-lint run' in project root.
• After import formatted, (using imports-formatter to run 'imports-formatter .' in project root, to format your import blocks, mentioned in CONTRIBUTING.md above)
• Your new-created file needs to have apache license at the top, like other existed file does.
• All integration test passed. You can run integration test locally (with docker env). Clone our dubbo-go-samples project and replace the go.mod to your dubbo-go, and run 'sudo sh start_integration_test.sh' at root of samples project root. (M1 Slice is not Support)

[codecov-commenter]

Codecov Report

Merging #1820 (0f77532) into 3.0 (7bc593b) will decrease coverage by 0.10%.
The diff coverage is 11.62%.

@@            Coverage Diff             @@
##              3.0    #1820      +/-   ##
==========================================
- Coverage   46.85%   46.75%   -0.11%     
==========================================
  Files         298      298              
  Lines       17163    17178      +15     
==========================================
- Hits         8042     8031      -11     
- Misses       8275     8293      +18     
- Partials      846      854       +8     

Impacted Files	Coverage Δ
protocol/dubbo/dubbo_codec.go	1.75% <0.00%> (-0.13%)	⬇️
protocol/dubbo/impl/codec.go	41.66% <0.00%> (-0.55%)	⬇️
remoting/getty/readwriter.go	39.28% <27.27%> (-3.31%)	⬇️
remoting/getty/listener.go	26.92% <50.00%> (ø)
filter/metrics/filter.go	85.00% <0.00%> (-15.00%)	⬇️
...tocol/rest/server/server_impl/go_restful_server.go	41.37% <0.00%> (-3.45%)	⬇️
registry/nacos/listener.go	78.26% <0.00%> (-2.61%)	⬇️
remoting/xds/client.go	56.00% <0.00%> (-0.89%)	⬇️

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[ztelur]

please fix ci failure

[AlexStocks]

pls do not merge this pr

[cvictory]

LGTM