feat(install-test)!: remove install test (#222)

BREAKING CHANGE: You should rely on [Check Extension](https://github.com/graycoreio/github-actions-magento2/blob/main/.github/workflows/check-extension-README.md) instead.

.github/workflows/_internal-install.yaml

@@ -1,56 +0,0 @@
-name: Installation Test
-
-on:
-  workflow_dispatch: {}
-  push:
-    branches:
-    - main
-    paths:
-    - "_test/demo-package/**"
-    - "installation-test/**"
-    - ".github/workflows/_internal-install.yaml"
-    - "supported-version/**"
-    - "!(**/*.md)"
-  pull_request:
-    branches:
-    - main
-    paths:
-    - "_test/demo-package/**"
-    - "installation-test/**"
-    - ".github/workflows/_internal-install.yaml"
-    - "supported-version/**"
-    - "!(**/*.md)"
-
-env:
-  MAGENTO_COMPOSER_REPO: "https://mirror.mage-os.org/"
-
-jobs:
-  compute_matrix:
-    runs-on: ubuntu-latest
-    outputs:
-      matrix: ${{ steps.supported-version.outputs.matrix }}
-    steps:
-      - uses: actions/checkout@v6
-      - uses: ./supported-version
-        with:
-          kind: currently-supported
-        id: supported-version
-      - run: echo ${{ steps.supported-version.outputs.matrix }}
-
-  install-test:
-    needs: compute_matrix
-    strategy:
-      matrix: ${{ fromJSON(needs.compute_matrix.outputs.matrix) }}
-      fail-fast: false
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v6
-    - uses: ./installation-test
-      with:
-        composer_version: ${{ matrix.composer }}
-        php_version: ${{ matrix.php }}
-        magento_version: ${{ matrix.magento }}
-        package_name: mage-os/magento2-demo-package
-        source_folder: $GITHUB_WORKSPACE/_test/demo-package
-        composer_auth: ${{ secrets.COMPOSER_AUTH }}
-        magento_repository: ${{ env.MAGENTO_COMPOSER_REPO }}