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/qemu-kvm-integration-tests.yml

@@ -47,7 +47,7 @@ jobs:
 
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Check if platform is supported
         id: check_platform
@@ -105,7 +105,7 @@ jobs:
           python3 -m pip install --upgrade pip
           sudo apt update
           sudo apt install -y --no-install-recommends git ansible-core genisoimage qemu-system-x86
-          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"
 
       # HACK: Drop this when moving this workflow to 26.04 LTS
       - name: Update podman to 5.x for compatibility with bootc-image-builder's podman 5
@@ -199,7 +199,7 @@ jobs:
               if tox -e "$env" -- --image-file "$(pwd)/$image_file" \
                      --log-level debug $TOX_ARGS \
                      --lsr-report-errors-url DEFAULT \
-                     -e __bootc_validation=true \
+                     -e "__bootc_validation: true" \
                      -- "$test" >out 2>&1; then
                   mv out "${test}-PASS.log"
               else