Github CI Updates (#6522)

* Bump unit tests OS
* Bump action cache version to v3
* Rework cache naming scheme

Signed-off-by: Derek Nola <derek.nola@suse.com>

.github/workflows/cgroup.yaml

@@ -56,7 +56,7 @@ jobs:
         uses: actions/download-artifact@v2
         with: { name: k3s, path: dist/artifacts/ }
       - name: "Vagrant Cache"
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: |
             ~/.vagrant.d/boxes

.github/workflows/install.yaml

@@ -49,7 +49,7 @@ jobs:
         uses: actions/checkout@v2
         with: {fetch-depth: 1}
       - name: "Vagrant Cache"
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: |
             ~/.vagrant.d/boxes

.github/workflows/nightly-install.yaml

@@ -28,12 +28,12 @@ jobs:
         uses: actions/checkout@v2
         with: {fetch-depth: 1}
       - name: "Vagrant Cache"
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: |
             ~/.vagrant.d/boxes
             ~/.vagrant.d/gems
-          key: install-${{ hashFiles(format('tests/install/{0}/Vagrantfile', matrix.vm)) }}
+          key: install-${{ matrix.vm }}-${{ hashFiles('tests/install/${{ matrix.vm }}/Vagrantfile') }}
         id: vagrant-cache
         continue-on-error: true
       - name: "Vagrant Plugin(s)"

.github/workflows/snapshotter.yaml

@@ -58,7 +58,7 @@ jobs:
         uses: actions/download-artifact@v2
         with: { name: k3s, path: dist/artifacts/ }
       - name: "Vagrant Cache"
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: |
             ~/.vagrant.d/boxes

.github/workflows/unitcoverage.yaml

@@ -27,7 +27,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-18.04, ubuntu-20.04]
+        os: [ubuntu-20.04, ubuntu-22.04]
     timeout-minutes: 20
     steps:
     - name: Checkout