ci: upload hw-test DTS/DTB/dmesg outputs as workflow artifacts

Hardware failures on the hw-coord (mini2) leg are now real test-code
bugs surfaced by CI (AD9081 JESD PLL lock failure on the System-API
path where the XSA path works), but debugging them blind from the
pytest tail is slow.  Attach `actions/upload-artifact@v4` steps to
both hw-direct and hw-coord that capture, per matrix leg, the
relevant artefacts under `test/hw/output/`:

- Generated `*.dts` / `*.pp.dts` (pre-dtc, after cpp)
- Compiled `*.dtb` / `*.dtbo`
- `dmesg_*.log` from the booted board
- Any `uart_log_*.txt` produced by `BootFPGASoC.debug_write_boot_log`
  when a boot stage times out

Uploaded with `if: always()` so failed runs attach outputs too.
Retention-days = 14 so they don't pile up.  Lets us diff the XSA vs
System-API DTS locally to pinpoint the remaining JESD-PLL gap.

Author: tfcollins

.github/workflows/hardware-test.yml

@@ -152,6 +152,21 @@ jobs:
           "$HOME/.cache/adidt-ci/adidt-venv/bin/pytest" \
             -p no:genalyzer -v -s ${{ join(matrix.node.tests, ' ') }}
 
+      - name: Upload test output artifacts
+        if: always() && steps.check_direct_env.outputs.skip != 'true'
+        uses: actions/upload-artifact@v4
+        with:
+          name: hw-direct-${{ matrix.node.place }}-output
+          path: |
+            test/hw/output/**/*.dts
+            test/hw/output/**/*.pp.dts
+            test/hw/output/**/*.dtb
+            test/hw/output/**/*.dtbo
+            test/hw/output/**/*.log
+            test/hw/output/**/uart_log_*.txt
+          if-no-files-found: ignore
+          retention-days: 14
+
   hw-coord:
     needs: preflight
     if: needs.preflight.outputs.available_nodes != '[]'
@@ -224,3 +239,18 @@ jobs:
           set -euo pipefail
           LGCLIENT="$HOME/.cache/adidt-ci/adidt-venv/bin/labgrid-client"
           "$LGCLIENT" -x "$LG_COORDINATOR" -p "${{ matrix.node.place }}" release || true
+
+      - name: Upload test output artifacts
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: hw-coord-${{ matrix.node.place }}-output
+          path: |
+            test/hw/output/**/*.dts
+            test/hw/output/**/*.pp.dts
+            test/hw/output/**/*.dtb
+            test/hw/output/**/*.dtbo
+            test/hw/output/**/*.log
+            test/hw/output/**/uart_log_*.txt
+          if-no-files-found: ignore
+          retention-days: 14