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/linux.yml

@@ -105,7 +105,9 @@ jobs:
       - name: Tidy
         run: python3 ./mach test-tidy --no-progress --all
       - name: Build (${{ inputs.profile }})
-        run: python3 ./mach build --${{ inputs.profile }}
+        run: |
+          python3 ./mach build --${{ inputs.profile }}
+          cp -r target/cargo-timings target/cargo-timings-linux
       - name: Smoketest
         run: xvfb-run python3 ./mach smoketest --${{ inputs.profile  }}
       - name: Script tests
@@ -117,12 +119,10 @@ jobs:
           timeout_minutes: 20
           max_attempts: 2 # https://github.com/servo/servo/issues/30683
           command: python ./mach test-unit --${{ inputs.profile }}
-      - name: Rename build timing
-        run: cp -r target/cargo-timings target/cargo-timings-linux
       - name: Archive build timing
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
-          name: cargo-timings
+          name: cargo-timings-linux
           # Using a wildcard here ensures that the archive includes the path.
           path: target/cargo-timings-*
       - name: Lockfile check
@@ -130,7 +130,7 @@ jobs:
       - name: Build mach package
         run: python3 ./mach package --${{ inputs.profile }}
       - name: Upload artifact for mach package
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: linux
           path: target/${{ inputs.profile }}/servo-tech-demo.tar.gz
@@ -147,9 +147,9 @@ jobs:
       - name: Build package for target
         run: tar -czf target.tar.gz target/${{ inputs.profile }}/servo resources
       - name: Upload artifact for target
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
-          name: release-binary
+          name: ${{ inputs.profile }}-binary-linux
           path: target.tar.gz
 
   wpt-2020: