Environment

• Server:
• Client:
• Protocol:
• Registry:

Issue description

code 1
https://github.com/apache/dubbo-go/blob/main/config/tls_config.go#L88

	caBytes, err := os.ReadFile(opt.CACertFile)
	if err != nil {
		return nil, err
	}
	if ok := ca.AppendCertsFromPEM(caBytes); !ok {
		return nil, err
	}

the err is nil in line 88, here should define an error to return

code 2

https://github.com/apache/dubbo-go/blob/main/protocol/triple/internal/client/common/client.go#L68

https://github.com/apache/dubbo-go/blob/main/protocol/triple/internal/client/common/client.go#L92

	if sendErr := stream.Send(&greet.GreetStreamRequest{Name: "triple"}); sendErr != nil {
		return err
	}

should return sendErr but return a nil value err

I create a linter to detect code that returns a non-relevant nilness error bug. I checked the top 1000 GitHub Go repositories and found this, all result listed in alingse/sundrylint#4

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