Update minimum go version (#1758)

* feat: update minimum version to 1.22

* refactor: use int range iterator

* refactor: loop variables

* refactor: replace slicesext.FirstNonZero with cmp.Or

* refactor: use slices.Concat instead of append

* fix: unused param

* fix: linting

signals_test.go

@@ -20,9 +20,7 @@ import (
 	"time"
 )
 
-var (
-	SLEEPIT, _ = filepath.Abs("./bin/sleepit")
-)
+var SLEEPIT, _ = filepath.Abs("./bin/sleepit")
 
 func TestSignalSentToProcessGroup(t *testing.T) {
 	task, err := getTaskPath()
@@ -147,7 +145,7 @@ func TestSignalSentToProcessGroup(t *testing.T) {
 			// where the negative PID means the corresponding process group. Note that
 			// this negative PID works only as long as the caller of the kill(2) system
 			// call has a different PID, which is the case for this test.
-			for i := 1; i <= tc.sendSigs; i++ {
+			for range tc.sendSigs - 1 {
 				if err := syscall.Kill(-sut.Process.Pid, syscall.SIGINT); err != nil {
 					t.Fatalf("sending INT signal to the process group: %v", err)
 				}