[CI] Set 7.17 28 in test-stack-command-7x step pipeline (#2433)

Set Elastic stack version 7.17.28 for pipeline step test-stack-command-7x

Author: mrodm

.github/workflows/updatecli/updatecli.d/bump-latest-7x-version.yml

@@ -27,10 +27,14 @@ scms:
 sources:
   latest7xSnapshot:
     name: Get latest 7.x snapshot
-    kind: json
+    kind: file
     spec:
-      file: https://storage.googleapis.com/artifacts-api/snapshots/7.17.json
-      key: .version
+      file: https://storage.googleapis.com/artifacts-api/releases/current/7.17
+    transformers:
+      # Get only the version to avoid spaces and newlines.
+      - findsubmatch:
+          pattern: '([0-9\.]+)'
+          captureindex: 1
 
 targets:
   update-7x-version:

Makefile

@@ -66,7 +66,7 @@ test-stack-command-oldest:
 	./scripts/test-stack-command.sh 7.14.2
 
 test-stack-command-7x:
-	./scripts/test-stack-command.sh 7.17.28-SNAPSHOT
+	./scripts/test-stack-command.sh 7.17.28
 
 # Keeping a test for 8.6 because it has an specific configuration file.
 test-stack-command-86: