[ci] force use a container image for check-foundation and test-archive-plugin

Author: sebsto

.github/workflows/integration_tests.yml

@@ -105,6 +105,8 @@ jobs:
       fail-fast: false
       matrix:
         examples: ${{ fromJson(inputs.archive_plugin_examples) }}
+    container:
+      image: ${{ matrix.swift.image }}
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -123,6 +125,8 @@ jobs:
     name: No dependencies on Foundation
     if: ${{ inputs.check_foundation_enabled }}
     runs-on: ubuntu-latest
+    container:
+      image: ${{ matrix.swift.image }}
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4