Disable pip steps to debug timeouts

Author: tuokri

.github/workflows/udk-tests.yaml

@@ -51,9 +51,9 @@ jobs:
             ${{ github.workspace }}/UDKTests/requirements.txt
             ${{ github.workspace }}/DevUtils/requirements.txt
 
-      - run: python -m pip install --upgrade pip
-      - run: pip install -r ${{ github.workspace }}/UDKTests/requirements.txt
-      - run: pip install -r ${{ github.workspace }}/DevUtils/requirements.txt
+      # - run: python -m pip install --upgrade pip
+      # - run: pip install -r ${{ github.workspace }}/UDKTests/requirements.txt
+      # - run: pip install -r ${{ github.workspace }}/DevUtils/requirements.txt
 
       - run: python --version