Run gopls modernize on codebase (#34751)

Recent modernize fixes:
https://github.com/golang/tools/commits/master/gopls/internal/analysis/modernize

models/user/user_test.go

@@ -204,9 +204,9 @@ func TestHashPasswordDeterministic(t *testing.T) {
 	b := make([]byte, 16)
 	u := &user_model.User{}
 	algos := hash.RecommendedHashAlgorithms
-	for j := 0; j < len(algos); j++ {
+	for j := range algos {
 		u.PasswdHashAlgo = algos[j]
-		for i := 0; i < 50; i++ {
+		for range 50 {
 			// generate a random password
 			rand.Read(b)
 			pass := string(b)