test: Remove schema files and adapt CI to fetch them

This removes the JSON Schema and XSD files that
stem from the aas-specs repository.
Instead, this adds the logic in the CI to fetch
these files at runtime.

Furthermore, we skip the unittests that make use
of the schema files when they do not exist.

.github/workflows/ci.yml

@@ -13,6 +13,7 @@ jobs:
         python-version: ["3.8", "3.10", "3.12"]
     env:
       COUCHDB_ADMIN_PASSWORD: "yo0Quai3"
+      AAS_SPECS_RELEASE_TAG: "V3.0.7"
     services:
       couchdb:
         image: couchdb:3
@@ -28,6 +29,11 @@ jobs:
       uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python-version }}
+    - name: Collect schema files from aas-specs
+      run: |
+        mkdir -p ./test/adapter/schema
+        curl -sSL -o ./test/adapter/schema/aasJSONSchema.json https://raw.githubusercontent.com/admin-shell-io/aas-specs/${{ env.AAS_SPECS_RELEASE_TAG }}/schemas/json/aas.json
+        curl -sSL -o ./test/adapter/schema/aasXMLSchema.xsd https://raw.githubusercontent.com/admin-shell-io/aas-specs/${{ env.AAS_SPECS_RELEASE_TAG }}/schemas/xml/AAS.xsd
     - name: Install Python dependencies
       run: |
         python -m pip install --upgrade pip

.gitignore

@@ -22,3 +22,5 @@
 
 # customized config files
 /test/test_config.ini
+# Schema files needed for testing
+/test/adapter/schemas