Make dependency-submission a separate workflow file and give write permission

In order to be able to actually submit dependencies to the API, the job
needs write permission.

Author: rhaendel

.github/workflows/dependency-submission.yml

@@ -0,0 +1,22 @@
+name: Dependency Submission
+
+on:
+  push:
+    branches: [ 'main' ]
+
+permissions:
+  contents: write
+
+jobs:
+  dependency-submission:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v4
+      - name: Setup Java
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: 21
+      - name: Generate and submit dependency graph
+        uses: gradle/actions/dependency-submission@v4

.github/workflows/gradle-build.yml

@@ -17,16 +17,3 @@ jobs:
       uses: gradle/actions/setup-gradle@v3
     - name: Build with Gradle
       run: ./gradlew build
-
-  dependency-submission:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout sources
-        uses: actions/checkout@v4
-      - name: Setup Java
-        uses: actions/setup-java@v4
-        with:
-          distribution: 'temurin'
-          java-version: 21
-      - name: Generate and submit dependency graph
-        uses: gradle/actions/dependency-submission@v4