Remove all action sources: these have been migrated to 'gradle/actions'

Starting with the `v3` release, this action will delegate to `gradle/actions/setup-gradle`.
All repository sources have been migrated to https://github.com/gradle/actions, and
are no longer required in this repository.

Workflows testing the action functionality have been retained, but any workflows involving
building or inspecting code have also been migrated to `gradle/actions`.

.github/dependabot.yml

@@ -15,18 +15,6 @@ updates:
         patterns:
         - "*"
 
-  - package-ecosystem: "npm"
-    directory: "/"
-    schedule:
-      interval: "weekly"
-    ignore:
-      - dependency-name: "@types/node" # Breaking change: update with next major release
-      - dependency-name: "@octokit/rest" # Tied to node version
-    groups:
-      npm-dependencies:
-        patterns:
-        - "*"
-
   - package-ecosystem: "gradle"
     directory: ".github/workflow-samples/gradle-plugin"
     registries:
@@ -63,9 +51,3 @@ updates:
       - gradle-plugin-portal
     schedule:
       interval: "daily"
-  - package-ecosystem: "gradle"
-    directory: "test/init-scripts"
-    registries:
-      - gradle-plugin-portal
-    schedule:
-      interval: "daily"

.github/workflows/ci-full-check.yml

@@ -20,11 +20,6 @@ jobs:
     with:
       cache-key-prefix: ${{github.run_number}}-
 
-  cache-cleanup:
-    uses: ./.github/workflows/integ-test-cache-cleanup.yml
-    with:
-      cache-key-prefix: ${{github.run_number}}-
-
   caching-config:
     uses: ./.github/workflows/integ-test-caching-config.yml
     with:

.github/workflows/ci-quick-check.yml

@@ -8,148 +8,84 @@ on:
     - release/**
 
 jobs:
-  build-distribution:
-    runs-on: ubuntu-latest
-    steps:
-    - name: Checkout sources
-      uses: actions/checkout@v4
-    - name: Build and upload distribution
-      uses: ./.github/actions/build-dist
-
-  run-unit-tests:
-    runs-on: ubuntu-latest
-    steps:
-    - name: Checkout sources
-      uses: actions/checkout@v4
-    - name: Configure Gradle as default for unit test
-      uses: ./
-      with:
-        gradle-version: 8.5
-    - name: Run tests
-      run: |
-        npm install
-        npm run all
-
   action-inputs:
-    needs: build-distribution
     uses: ./.github/workflows/integ-test-action-inputs.yml
     with:
       runner-os: '["ubuntu-latest"]'
-      download-dist: true
-
-  cache-cleanup:
-    needs: build-distribution
-    uses: ./.github/workflows/integ-test-cache-cleanup.yml
-    with:
-      runner-os: '["ubuntu-latest"]'
-      download-dist: true
-      cache-key-prefix: ${{github.run_number}}- # Requires a fresh cache entry each run
 
   caching-config:
-    needs: build-distribution
     uses: ./.github/workflows/integ-test-caching-config.yml
     with:
       runner-os: '["ubuntu-latest"]'
-      download-dist: true
 
   dependency-graph:
-    needs: build-distribution
     uses: ./.github/workflows/integ-test-dependency-graph.yml
     permissions:
       contents: write
     with:
       runner-os: '["ubuntu-latest"]'
-      download-dist: true
 
   dependency-graph-failures:
-    needs: build-distribution
     uses: ./.github/workflows/integ-test-dependency-graph-failures.yml
     with:
       runner-os: '["ubuntu-latest"]'
-      download-dist: true
 
   execution-with-caching:
-    needs: build-distribution
     uses: ./.github/workflows/integ-test-execution-with-caching.yml
     with:
       runner-os: '["ubuntu-latest"]'
-      download-dist: true
 
   execution:
-    needs: build-distribution
     uses: ./.github/workflows/integ-test-execution.yml
     with:
       runner-os: '["ubuntu-latest"]'
-      download-dist: true
 
   develocity-injection:
-    needs: build-distribution
     uses: ./.github/workflows/integ-test-inject-develocity.yml
     with:
       runner-os: '["ubuntu-latest"]'
-      download-dist: true
     secrets:
       DEVELOCITY_ACCESS_KEY: ${{ secrets.GE_SOLUTIONS_ACCESS_TOKEN }}
 
   provision-gradle-versions:
-    needs: build-distribution
     uses: ./.github/workflows/integ-test-provision-gradle-versions.yml
     with:
       runner-os: '["ubuntu-latest"]'
-      download-dist: true
 
   restore-configuration-cache:
-    needs: build-distribution
     uses: ./.github/workflows/integ-test-restore-configuration-cache.yml
     with:
       runner-os: '["ubuntu-latest"]'
-      download-dist: true
     secrets:
       GRADLE_ENCRYPTION_KEY: ${{ secrets.GRADLE_ENCRYPTION_KEY }}
 
   restore-containerized-gradle-home:
-    needs: build-distribution
     uses: ./.github/workflows/integ-test-restore-containerized-gradle-home.yml
-    with:
-      download-dist: true
 
   restore-custom-gradle-home:
-    needs: build-distribution
     uses: ./.github/workflows/integ-test-restore-custom-gradle-home.yml
-    with:
-      download-dist: true
 
   restore-gradle-home:
-    needs: build-distribution
     uses: ./.github/workflows/integ-test-restore-gradle-home.yml
     with:
       runner-os: '["ubuntu-latest"]'
-      download-dist: true
 
   restore-java-toolchain:
-    needs: build-distribution
     uses: ./.github/workflows/integ-test-restore-java-toolchain.yml
     with:
       runner-os: '["ubuntu-latest"]'
-      download-dist: true
 
   sample-kotlin-dsl:
-    needs: build-distribution
     uses: ./.github/workflows/integ-test-sample-kotlin-dsl.yml
     with:
       runner-os: '["ubuntu-latest"]'
-      download-dist: true
 
   sample-gradle-plugin:
-    needs: build-distribution
     uses: ./.github/workflows/integ-test-sample-gradle-plugin.yml
     with:
       runner-os: '["ubuntu-latest"]'
-      download-dist: true
 
   toolchain-detection:
-    needs: build-distribution
     uses: ./.github/workflows/integ-test-detect-java-toolchains.yml
     with:
       runner-os: '["ubuntu-latest"]'
-      download-dist: true