(CAT-2013) Adjust shellcheck call

Shellcheck has been moved to our reusable workflows repository and is
now part os our CI testing. As such, we are removing the action from
here and enabling it to be called.

Author: LukasAud

.github/workflows/ci.yml

@@ -7,15 +7,8 @@ on:
   workflow_dispatch:
 
 jobs:
-  shellcheck:
-    name: Shellcheck
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: reviewdog/action-shellcheck@v1
-        with:
-          check_all_files_with_shebangs: "true"
-
   Spec:
     uses: "puppetlabs/cat-github-actions/.github/workflows/module_ci.yml@main"
+    with: 
+      run_shellcheck: true
     secrets: "inherit"