Update Docker matrix and artifact naming in CI workflow

Switches the matrix strategy in build.yml to use an 'include' list with both docker-rev and artifact-suffix. Artifact names now use artifact-suffix for clearer identification of Dockerfile variants in uploaded reports.

.github/workflows/build.yml

@@ -262,7 +262,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        docker-rev: ["docker/embedded/Dockerfile", "docker/embedded/Dockerfile.ultra-lite", "docker/embedded/Dockerfile.fat"]
+        include:
+          - docker-rev: docker/embedded/Dockerfile
+            artifact-suffix: Dockerfile
+          - docker-rev: docker/embedded/Dockerfile.ultra-lite
+            artifact-suffix: Dockerfile.ultra-lite
+          - docker-rev: docker/embedded/Dockerfile.fat
+            artifact-suffix: Dockerfile.fat
     steps:
       - name: Harden Runner
         uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
@@ -320,7 +326,7 @@ jobs:
         if: always()
         uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
-          name: reports-docker-${{ matrix.docker-rev }}
+          name: reports-docker-${{ matrix.artifact-suffix }}
           path: |
             build/reports/tests/
             build/test-results/