ci: rollout several recent changes to CI testing

* Pass in a YAML true value as `__bootc_validation: true` using
the --extra-vars option to ensure that `__bootc_validation` is
treated as a boolean and not a string value.

`-e "__bootc_validation: true"`

You can also use JSON format:

`-e '{"__bootc_validation": true}'`

but YAML is simpler in this case.

* Use tox-lsr version 3.11.1

* Ensure the citest bad comment works when the test was cancelled in
addition to the failure case.

* Update contributing.md documentation

* Update number of nodes to use in testing farm, if needed

* remove unnecessary ansible-lint skips

Signed-off-by: Rich Megginson <rmeggins@redhat.com>

.github/workflows/ansible-test.yml

@@ -28,12 +28,12 @@ jobs:
           sudo apt install -y git
 
       - name: Checkout repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Install tox, tox-lsr
         run: |
           set -euxo pipefail
-          pip3 install "git+https://github.com/linux-system-roles/tox-lsr@3.11.0"
+          pip3 install "git+https://github.com/linux-system-roles/tox-lsr@3.11.1"
 
       - name: Convert role to collection format
         run: |