Skip Docker steps on Windows runners in CI (#1411)

The 'Verify Docker is running' and 'Dump docker info' steps are
meaningless on Windows runners since Linux containers are not
supported there. Gate both steps with runner.os == 'Linux' so they
are skipped on Windows without affecting the Linux flow.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: aaronpowell

.github/workflows/tests.yaml

@@ -97,6 +97,7 @@ jobs:
           docker-registry: ${{ secrets.CUSTOM_CONTAINER_REGISTRY }}
 
       - name: Verify Docker is running
+        if: runner.os == 'Linux'
         run: docker info
 
       - name: Build test project
@@ -126,7 +127,7 @@ jobs:
           CUSTOM_CONTAINER_REGISTRY: ${{ secrets.CUSTOM_CONTAINER_REGISTRY }}
 
       - name: Dump docker info
-        if: always()
+        if: always() && runner.os == 'Linux'
         run: |
           docker container ls --all
           docker container ls --all --format json