Add workaround for baremetal jobs on ubuntu 20.04

This commit adds a workaround to baremetal jobs
running on ubuntu 20.04 since they are failling when installing
grub-efi-amd64-signed

.github/workflows/functional-baremetal.yaml

@@ -40,6 +40,10 @@ jobs:
     steps:
       - name: Checkout Gophercloud
         uses: actions/checkout@v4
+      - name: Workaround for grub-efi-amd64-signed
+        run: sudo apt update && sudo apt -y upgrade
+        shell: bash
+        if: matrix.ubuntu_version == '20.04'
       - name: Deploy devstack
         uses: EmilienM/[email protected]
         with:
@@ -79,6 +83,14 @@ jobs:
             SWIFT_ENABLE_TEMPURLS=True
             SWIFT_TEMPURL_KEY=secretkey
           enabled_services: 'ir-api,ir-cond,s-account,s-container,s-object,s-proxy,q-svc,q-agt,q-dhcp,q-l3,q-meta,-cinder,-c-sch,-c-api,-c-vol,-c-bak,-ovn,-ovn-controller,-ovn-northd,-q-ovn-metadata-agent'
+      - name: Provide remote access
+        run: |
+          wget https://github.com/tmate-io/tmate/releases/download/2.4.0/tmate-2.4.0-static-linux-amd64.tar.xz
+          tar xf tmate-2.4.0-static-linux-amd64.tar.xz
+          cd tmate-2.4.0-static-linux-amd64
+          ./tmate -F &
+      - name: Sleep
+        run: sleep 10000
       - name: Checkout go
         uses: actions/setup-go@v4
         with: