Don't upload multiple times to same artifact in integration test workflow

The `all-inputs` job of the "Run integration tests" GitHub Actions workflow is configured to generate multiple parallel
jobs. A GitHub Actions workflow artifact was used to transfer the sketches report files generated by the
"arduino/compile-sketches" action in each job to the subsequent job. The "actions/upload-artifact" and
"actions/download-artifact" actions are used for this purpose.

Previously, a single artifact was used for the transfer of all the sketches reports, with each of the parallel jobs
uploading its own generated files to that single artifact. However, support for uploading multiple times to a single
artifact was dropped in version 4.0.0 of the "actions/upload-artifact" action. So it is now necessary to use a dedicated
artifact for each of the parallel jobs. These artifacts  can be downloaded in aggregate by using the artifact name
globbing and merging features which were introduced in version 4.1.0 of the "actions/download-artifact" action.

Author: per1234

.github/workflows/test-integration.yml

@@ -92,6 +92,7 @@ jobs:
       matrix:
         board:
           - fqbn: arduino:avr:uno
+            artifact-name-suffix: arduino-avr-uno
             platforms: |
               - name: arduino:avr
                 version: 1.8.3
@@ -100,6 +101,7 @@ jobs:
                 version: 1.1.7
           # Board that requires Boards Manager URL
           - fqbn: esp8266:esp8266:huzzah
+            artifact-name-suffix: esp8266-esp8266-huzzah
             platforms: |
               - name: esp8266:esp8266
                 source-url: https://arduino.esp8266.com/stable/package_esp8266com_index.json
@@ -140,18 +142,18 @@ jobs:
           [ -d ${{ env.TESTDATA_SKETCHES_PATH }}/BareMinimum/build ]
 
       - name: Set report artifact name
-        id: report-artifact-name
+        id: report-artifact-prefix
         run: |
-          echo "report-artifact-name=${{ github.job }}" >> "$GITHUB_OUTPUT"
+          echo "report-artifact-prefix=${{ github.job }}" >> "$GITHUB_OUTPUT"
 
       - name: Save sketches report as workflow artifact
         uses: actions/upload-artifact@v4
         with:
           path: sketches-reports
-          name: ${{ steps.report-artifact-name.outputs.report-artifact-name }}
+          name: ${{ steps.report-artifact-prefix.outputs.report-artifact-prefix }}-${{ matrix.board.artifact-name-suffix }}
 
     outputs:
-      report-artifact-name: ${{ steps.report-artifact-name.outputs.report-artifact-name }}
+      report-artifact-prefix: ${{ steps.report-artifact-prefix.outputs.report-artifact-prefix }}
 
   multiple-steps:
     name: multiple-steps (${{ matrix.board.source-type }})
@@ -322,8 +324,9 @@ jobs:
       - name: Download sketches reports artifact
         uses: actions/download-artifact@v4
         with:
-          name: ${{ needs.all-inputs.outputs.report-artifact-name }}
+          merge-multiple: true
           path: ${{ env.SKETCHES_REPORTS_PATH }}
+          pattern: ${{ needs.all-inputs.outputs.report-artifact-prefix }}*
 
       - name: Compare generated sketches report to golden report
         run: |
@@ -349,7 +352,7 @@ jobs:
                   "$reportPath" \
                 --slurpfile \
                   golden \
-                  "${{ env.TESTDATA_REPORTS_PATH }}/${{ needs.all-inputs.outputs.report-artifact-name }}/$(basename "$reportPath")" \
+                  "${{ env.TESTDATA_REPORTS_PATH }}/${{ needs.all-inputs.outputs.report-artifact-prefix }}/$(basename "$reportPath")" \
                 '($generated|.[0].boards) == ($golden|.[0].boards)'
             ) && (
               # Check the commit_hash value