ci(github): bump java to 21

Including remove the build of import/export tool which is not possible
currently with java 21 due to issues with WSDL plugin. See
import-export-tool/README.md.

.github/workflows/ci.yaml

@@ -53,11 +53,11 @@ jobs:
         with:
           node-version-file: '.nvmrc'
 
-      - name: Set up JDK 11
+      - name: Set up JDK 21
         uses: actions/setup-java@v3
         with:
           distribution: adopt
-          java-version: 11
+          java-version: 21
 
       - name: Install node dependencies (oeq-rest-api)
         working-directory: oeq-ts-rest-api
@@ -179,28 +179,6 @@ jobs:
           name: Storybook
           path: react-front-end/storybook.tar
 
-  build_import_export_tool:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Set up JDK 11
-        uses: actions/setup-java@v3
-        with:
-          distribution: adopt
-          java-version: 11
-
-      - name: Build
-        working-directory: import-export-tool
-        run: |
-          ./gradlew build
-
-      - name: Save primary artefacts
-        uses: actions/[email protected]
-        with:
-          name: ImportExportTools
-          path: import-export-tool/build/libs/
-
   functional_testing:
     needs: build_and_check
 
@@ -244,11 +222,11 @@ jobs:
             ffmpeg \
             libimage-exiftool-perl
 
-      - name: Set up JDK 11
+      - name: Set up JDK 21
         uses: actions/setup-java@v3
         with:
           distribution: adopt
-          java-version: 11
+          java-version: 21
 
       - uses: actions/checkout@v4
 
@@ -369,11 +347,11 @@ jobs:
             ffmpeg \
             libimage-exiftool-perl
 
-      - name: Set up JDK 11
+      - name: Set up JDK 21
         uses: actions/setup-java@v3
         with:
           distribution: adopt
-          java-version: 11
+          java-version: 21
 
       - name: Setup node
         uses: actions/setup-node@v3