chore(test): Refactor loop to use range over integer in test (#2494)

Author: 12ya

test/e2e/crds/v1alpha1/consumer.go

@@ -190,7 +190,7 @@ spec:
 				Check: scaffold.WithExpectedStatus(503),
 			})
 
-			for i := 0; i < 10; i++ {
+			for range 10 {
 				s.RequestAssert(&scaffold.RequestAssert{
 					Method: "GET",
 					Path:   "/get",

test/e2e/gatewayapi/httproute.go

@@ -1676,7 +1676,7 @@ spec:
 					hitNginxCnt   = 0
 					hitHttpbinCnt = 0
 				)
-				for i := 0; i < 20; i++ {
+				for range 20 {
 					resp := s.NewAPISIXClient().GET("/get").
 						WithHeader("Host", "httpbin.example").
 						Expect()
@@ -1702,7 +1702,7 @@ spec:
 					hitNginxCnt   = 0
 					hitHttpbinCnt = 0
 				)
-				for i := 0; i < 20; i++ {
+				for range 20 {
 					resp := s.NewAPISIXClient().GET("/get").
 						WithHeader("Host", "httpbin.example").
 						Expect()
@@ -1879,7 +1879,7 @@ spec:
 			upstreamHosts := make(map[string]int)
 			totalRequests := 20
 
-			for i := 0; i < totalRequests; i++ {
+			for range totalRequests {
 				statusCode := s.NewAPISIXClient().GET("/headers").Expect().Raw().StatusCode
 				Expect(statusCode).To(Or(Equal(http.StatusOK), Equal(http.StatusMovedPermanently)))