Download chectl install script from che-incubator.github.io in tests (#22929)

Signed-off-by: Dmytro Nochevnov <dnochevn@redhat.com>

Author: dmytro-ndp

.github/workflows/pr-check.yml

@@ -55,7 +55,7 @@ jobs:
           minikube-version: v1.23.2
 
       - name: Install chectl
-        run: bash <(curl -sL https://www.eclipse.org/che/chectl/) --channel=next
+        run: bash <(curl -sL https://che-incubator.github.io/chectl/install.sh) --channel=next
 
       - name: Deploy Che
         run: |