ci: Switch to version 4 of GitHub artifact actions (#31357)

* ci: Switch to version 4 of GitHub artifact actions

This switches to version 4 of the GitHub artifact actions, which
requires producing a single artifact per job and adding merge steps. In
addition, the names of artifacts are standardized:

- Build: <profile>-binary-<platform>
- Full WPT results (only on failure): wpt-full-logs-<platform>-<layout>
- Filtered WPT results (only on failure): wpt-filtered-logs-<platform>-<layout>

* Delete merged build timings and combine with Result job

* Always archives logs even after test failures

* Correct the name of the log files for WPT import

.github/workflows/scheduled-wpt-import.yml

@@ -31,8 +31,12 @@ jobs:
         uses: actions/checkout@v3
         with:
           fetch-depth: 2
-      # Download all artifacts
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
+        with:
+          name: wpt-full-logs-linux-layout-2013
+      - uses: actions/download-artifact@v4
+        with:
+          name: wpt-full-logs-linux-layout-2020
       - name: Prep environment
         run: |
           python3 -m pip install --upgrade pip
@@ -52,8 +56,8 @@ jobs:
           export CURRENT_DATE=$(date +"%d-%m-%Y")
           echo $CURRENT_DATE
           echo "CURRENT_DATE=$CURRENT_DATE" >> $GITHUB_ENV
-          ./mach update-wpt --legacy-layout wpt-logs-linux-layout-2013/test-wpt.*.log
-          ./mach update-wpt wpt-logs-linux-layout-2020/test-wpt.*.log
+          ./mach update-wpt linux-layout-2013/*.log --legacy-layout
+          ./mach update-wpt linux-layout-2020/*.log
           git add tests/wpt/meta tests/wpt/meta-legacy-layout
           git commit -a --amend --no-edit
       - name: Push changes