refactor: replace adminhelper with local addHostsEntry in proxy tests

552bd4b added adminhelper implementation
for integration test but it fails because admin helper path is depend on
crc binary path and integration test is also standalone built and run in testing
machine so it is not able to get right admin helper binary. This PR remove current
implementation and add cross-platform hosts file modification directly in the test,
supporting Windows, Linux, and macOS.

Note: It is assume that test on windows have admin rights, for mac/linux we are using
sudo but in windows it might be problem to have UAC prompt.

Author: praveenkumar

test/integration/hosts_unix.go

@@ -0,0 +1,14 @@
+//go:build !windows
+
+package test_test
+
+import (
+	crcos "github.com/crc-org/crc/v2/pkg/os"
+)
+
+// addHostsEntry adds an entry to /etc/hosts using sudo tee.
+func addHostsEntry(ip, hostname string) error {
+	cmd := `printf '%s %s\n' "$1" "$2" | tee -a /etc/hosts > /dev/null`
+	_, _, err := crcos.RunPrivileged("adding hosts entry for proxy test", "sh", "-c", cmd, "addHostsEntry", ip, hostname)
+	return err
+}

test/integration/hosts_windows.go

@@ -0,0 +1,26 @@
+//go:build windows
+
+package test_test
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/crc-org/crc/v2/pkg/os/windows/powershell"
+)
+
+// addHostsEntry adds an entry to the Windows hosts file using ExecuteAsAdmin.
+func addHostsEntry(ip, hostname string) error {
+	systemRoot := os.Getenv("SystemRoot")
+	if systemRoot == "" {
+		systemRoot = `C:\Windows`
+	}
+	hostsPath := filepath.Join(systemRoot, "System32", "drivers", "etc", "hosts")
+
+	entry := fmt.Sprintf("%s %s", ip, hostname)
+	cmd := fmt.Sprintf(`Add-Content -Path "%s" -Value "%s"`, hostsPath, entry)
+
+	_, _, err := powershell.ExecuteAsAdmin("adding hosts entry for proxy test", cmd)
+	return err
+}

test/integration/proxy_test.go

@@ -9,7 +9,6 @@ import (
 	"os/exec"
 	"time"
 
-	"github.com/crc-org/crc/v2/pkg/crc/adminhelper"
 	crc "github.com/crc-org/crc/v2/test/extended/crc/cmd"
 	"github.com/crc-org/crc/v2/test/extended/util"
 	. "github.com/onsi/ginkgo/v2"
@@ -141,9 +140,8 @@ var _ = Describe("", Serial, Ordered, Label("openshift-preset", "goproxy"), func
 		})
 
 		It("add host.crc.testing to host's /etc/hosts", func() {
-			// After setup, adminhelper is available
 			// Add host.crc.testing -> 127.0.0.1 so host can resolve it to localhost proxy
-			err := adminhelper.AddToHostsFile("127.0.0.1", "host.crc.testing")
+			err := addHostsEntry("127.0.0.1", "host.crc.testing")
 			Expect(err).NotTo(HaveOccurred())
 		})