CI: generalize determine changed files job

Generalize determine changed files job for kernel and packages workflow.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

Author: Ansuel

.github/workflows/kernel.yml

@@ -11,19 +11,7 @@ on:
 jobs:
   determine_changed_files:
     name: Determine Changed Files
-    runs-on: ubuntu-latest
-    outputs:
-      all_changed_files: ${{ steps.changed-files.outputs.all_changed_files }}
-
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 2
-
-      - name: Get changed files
-        id: changed-files
-        uses: tj-actions/changed-files@v42
+    uses: ./.github/workflows/reusable_determine_changed_files.yml
 
   determine_targets:
     name: Set targets

.github/workflows/packages.yml

@@ -11,19 +11,7 @@ on:
 jobs:
   determine_changed_files:
     name: Determine Changed Files
-    runs-on: ubuntu-latest
-    outputs:
-      all_changed_files: ${{ steps.changed-files.outputs.all_changed_files }}
-
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 2
-
-      - name: Get changed files
-        id: changed-files
-        uses: tj-actions/changed-files@v42
+    uses: ./.github/workflows/reusable_determine_changed_files.yml
 
   determine_changed_packages:
     name: Determine Changed Packages

.github/workflows/reusable_determine_changed_files.yml

@@ -0,0 +1,24 @@
+name: Determine Changed Files
+
+on:
+  workflow_call:
+    outputs:
+      all_changed_files:
+        value: ${{ jobs.determine_changed_files.outputs.all_changed_files }}
+
+jobs:
+  determine_changed_files:
+    name: Determine Changed Files
+    runs-on: ubuntu-latest
+    outputs:
+      all_changed_files: ${{ steps.changed-files.outputs.all_changed_files }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 2
+
+      - name: Get changed files
+        id: changed-files
+        uses: tj-actions/changed-files@v42