clone extra tests repo for all tests

Author: galabovaa

.github/workflows/build-unit-tests-external.yml

@@ -51,6 +51,17 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Clone extra unit tests repo 
+        shell: bash
+        working-directory: ${{runner.workspace}}
+        run: |
+          git clone https://github.com/galabovaa/highs-unit-tests.git
+
+      - name: Create symlink
+        shell: bash
+        working-directory: ${{runner.workspace}}
+        run: ln -s ${{runner.workspace}}/highs-unit-tests $GITHUB_WORKSPACE/check
+        
       - name: Create Build Environment
         run: cmake -E make_directory ${{runner.workspace}}/build