Disable garden-linux integration tests (#2631)

Author: ovalenti

.github/workflows/integration-tests.yml

@@ -57,7 +57,6 @@ jobs:
           - fedora-coreos
           - rhel
           - rhel-sap
-          - garden-linux
     with:
       vm_type: ${{ matrix.vm_type }}
       collector-tag: ${{ inputs.collector-tag }}