Extend linter rules (#1300)

- dupword checks for duplicate words in the source code
- durationcheck checks for two durations multiplied together
- forbidigo forbids identifiers
- mirror reports wrong mirror patterns of bytes/strings usage
- misspell finds commonly misspelled English words in comments
- predeclared finds code that shadows one of Go's predeclared identifiers
- thelper detects Go test helpers without t.Helper() call and checks the consistency of test helpers

client/system/info_darwin.go

@@ -3,7 +3,6 @@ package system
 import (
 	"bytes"
 	"context"
-	"fmt"
 	"os"
 	"os/exec"
 	"runtime"
@@ -21,7 +20,7 @@ func GetInfo(ctx context.Context) *Info {
 	utsname := unix.Utsname{}
 	err := unix.Uname(&utsname)
 	if err != nil {
-		fmt.Println("getInfo:", err)
+		log.Warnf("getInfo: %s", err)
 	}
 	sysName := string(bytes.Split(utsname.Sysname[:], []byte{0})[0])
 	machine := string(bytes.Split(utsname.Machine[:], []byte{0})[0])