Update tested platforms (#175)

* Update tested platforms

- Remove CentOS 8, Debian 9 & Ubuntu 16.04
- Add CentOS Stream 8, Alma Linux 8, Rocky Linux 8, Debian 11
- Remove SmartOS from ChefSpec as the platform will deprecated soon

Signed-off-by: Lance Albertson <lance@osuosl.org>

* Switch to using lint-unit job instead of chef-delivery

Signed-off-by: Lance Albertson <lance@osuosl.org>

* Remove delivery and move to calling RSpec directly via a reusable workflow

Signed-off-by: Lance Albertson <lance@osuosl.org>

.github/workflows/ci.yml

@@ -8,48 +8,26 @@ name: ci
       - main
 
 jobs:
-  delivery:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Check out code
-        uses: actions/checkout@v2
-      - name: Run Chef Delivery
-        uses: actionshub/chef-delivery@main
-        env:
-          CHEF_LICENSE: accept-no-persist
-
-  yamllint:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Check out code
-        uses: actions/checkout@v2
-      - name: Run yaml Lint
-        uses: actionshub/yamllint@main
-
-  mdl:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Check out code
-        uses: actions/checkout@v2
-      - name: Run Markdown Lint
-        uses: actionshub/markdownlint@main
+  lint-unit:
+    uses: sous-chefs/.github/.github/workflows/lint-unit.yml@0.0.3
 
   integration:
-    needs: [mdl, yamllint, delivery]
+    needs: 'lint-unit'
     runs-on: ubuntu-latest
     strategy:
       matrix:
         os:
+          - 'almalinux-8'
           - 'amazonlinux-2'
-          - 'debian-9'
-          - 'debian-10'
           - 'centos-7'
-          - 'centos-8'
+          - 'centos-stream-8'
+          - 'debian-10'
+          - 'debian-11'
           - 'fedora-latest'
-          - 'ubuntu-1604'
+          - 'opensuse-leap-15'
+          - 'rockylinux-8'
           - 'ubuntu-1804'
           - 'ubuntu-2004'
-          - 'opensuse-leap-15'
         suite:
           - 'default'
           - 'aliases'