Remove ansible install step from kubevirt GHA

Ansible 2.17 is already included in the ubuntu-latest runner image, so
there's no need for a separate install step. It was broken in any case
because the python version being used was too low for ansible 2.18.

.github/workflows/integration-tests-kubevirt.yaml

@@ -72,14 +72,6 @@ jobs:
           path: ${{ env.kubevirt }}
           ref: main
 
-      # Install ansible
-      - name: Install ansible-core (${{ env.ansible_version }})
-        run: >-
-          python3 -m pip install
-          https://github.com/ansible/ansible/archive/${{ env.ansible_version }}.tar.gz
-          --disable-pip-version-check
-        shell: bash
-
       - name: Build and install kubevirt.core collection
         id: install-kubevirt
         uses: ansible-network/github_actions/.github/actions/build_install_collection@main