Don't upload multiple times to same artifact in release workflow

The "Release" GitHub Actions workflow generates binaries for a range of target hosts. This is done by using a job matrix
that produces each build in a parallel job. GitHub Actions workflow artifacts are used to transfer the generated files
between sequential jobs in the workflow. The "actions/upload-artifact" and "actions/download-artifact" actions are used
for this purpose.

Previously, a single artifact was used for this purpose, with each of the parallel jobs uploading its own generated
files to that 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 builds.
These 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.

.github/workflows/release-go-crosscompile-task.yml

@@ -8,7 +8,7 @@ env:
   DIST_DIR: dist
   # The project's folder on Arduino's download server for uploading builds
   AWS_PLUGIN_TARGET: /arduinoOTA/
-  ARTIFACT_NAME: dist
+  ARTIFACT_PREFIX: dist-
   # See: https://github.com/actions/setup-go/tree/main#supported-version-syntax
   GO_VERSION: "1.17"
 
@@ -23,16 +23,25 @@ jobs:
 
     strategy:
       matrix:
-        task:
-          - Windows_32bit
-          - Windows_64bit
-          - Linux_32bit
-          - Linux_64bit
-          - Linux_ARMv6
-          - Linux_ARMv7
-          - Linux_ARM64
-          - macOS_64bit
-          - macOS_ARM64
+        os:
+          - task: Windows_32bit
+            artifact-suffix: Windows_32bit
+          - task: Windows_64bit
+            artifact-suffix: Windows_64bit
+          - task: Linux_32bit
+            artifact-suffix: Linux_32bit
+          - task: Linux_64bit
+            artifact-suffix: Linux_64bit
+          - task: Linux_ARMv6
+            artifact-suffix: Linux_ARMv6
+          - task: Linux_ARMv7
+            artifact-suffix: Linux_ARMv7
+          - task: Linux_ARM64
+            artifact-suffix: Linux_ARM64
+          - task: macOS_64bit
+            artifact-suffix: macOS_64bit
+          - task: macOS_ARM64
+            artifact-suffix: macOS_ARM64
 
     steps:
       - name: Checkout repository
@@ -42,7 +51,7 @@ jobs:
 
       - name: Create changelog
         # Avoid creating the same changelog for each os
-        if: matrix.task == 'Windows_32bit'
+        if: matrix.os.task == 'Windows_32bit'
         uses: arduino/create-changelog@v1
         with:
           tag-regex: '^[0-9]+\.[0-9]+\.[0-9]+.*$'
@@ -62,17 +71,17 @@ jobs:
           version: 3.x
 
       - name: Build
-        run: task dist:${{ matrix.task }}
+        run: task dist:${{ matrix.os.task }}
 
       - name: Upload artifacts
         uses: actions/upload-artifact@v4
         with:
           if-no-files-found: error
-          name: ${{ env.ARTIFACT_NAME }}
+          name: ${{ env.ARTIFACT_PREFIX }}${{ matrix.os.artifact-suffix }}
           path: ${{ env.DIST_DIR }}
 
   notarize-macos:
-    name: Notarize ${{ matrix.build.folder-suffix }}
+    name: Notarize ${{ matrix.build.artifact-suffix }}
     runs-on: macos-latest
     needs: create-release-artifacts
     outputs:
@@ -85,9 +94,11 @@ jobs:
     strategy:
       matrix:
         build:
-          - folder-suffix: darwin_amd64
+          - artifact-suffix: macOS_64bit
+            folder-suffix: darwin_amd64
             package-suffix: "macOS_64bit.tar.gz"
-          - folder-suffix: darwin_arm64
+          - artifact-suffix: macOS_ARM64
+            folder-suffix: darwin_arm64
             package-suffix: "macOS_ARM64.tar.gz"
 
     steps:
@@ -104,9 +115,14 @@ jobs:
       - name: Download artifacts
         uses: actions/download-artifact@v4
         with:
-          name: ${{ env.ARTIFACT_NAME }}
+          name: ${{ env.ARTIFACT_PREFIX }}${{ matrix.build.artifact-suffix }}
           path: ${{ env.DIST_DIR }}
 
+      - name: Remove non-notarized artifact
+        uses: geekyeggo/delete-artifact@v5
+        with:
+          name: ${{ env.ARTIFACT_PREFIX }}${{ matrix.build.artifact-suffix }}
+
       - name: Import Code-Signing Certificates
         env:
           KEYCHAIN: "sign.keychain"
@@ -172,11 +188,11 @@ jobs:
           chmod +x "${{ env.BUILD_FOLDER }}/${{ env.PROJECT_NAME }}"
           tar -czvf "${{ env.PACKAGE_FILENAME }}" "${{ env.BUILD_FOLDER }}/"
 
-      - name: Upload artifact
+      - name: Upload notarized artifact
         uses: actions/upload-artifact@v4
         with:
           if-no-files-found: error
-          name: ${{ env.ARTIFACT_NAME }}
+          name: ${{ env.ARTIFACT_PREFIX }}${{ matrix.build.artifact-suffix }}
           path: ${{ env.DIST_DIR }}/${{ env.PACKAGE_FILENAME }}
 
   create-release:
@@ -187,8 +203,9 @@ jobs:
       - name: Download artifact
         uses: actions/download-artifact@v4
         with:
-          name: ${{ env.ARTIFACT_NAME }}
+          merge-multiple: true
           path: ${{ env.DIST_DIR }}
+          pattern: ${{ env.ARTIFACT_PREFIX }}*
 
       - name: Create checksum file
         working-directory: ${{ env.DIST_DIR}}