test-build.yml: Add test-docs-build

Try use self hosted linux runner with build artifact to build html and latexpdf to check for errors.

.github/workflows/test-build.yml

@@ -179,3 +179,35 @@ jobs:
         shell: bash
         run: |
           make -C docs test -j${{ env.procs }}
+
+  test-docs-build:
+    name: Try build docs
+    runs-on: [self-hosted, linux, x64]
+    needs: [test-docs, pre_docs_job]
+    if: needs.pre_docs_job.outputs.should_skip != 'true'
+    strategy:
+      matrix:
+        docs-target: [html, latexpdf]
+      fail-fast: false
+    steps:
+      - name: Checkout Yosys
+        uses: actions/checkout@v4
+
+      - name: Runtime environment
+        run: |
+          echo "procs=$(nproc)" >> $GITHUB_ENV
+
+      - name: Download build artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: build-ubuntu-latest
+
+      - name: Uncompress build
+        shell: bash
+        run:
+          tar -xvf build.tar
+
+      - name: Build docs
+        shell: bash
+        run: |
+          make docs DOC_TARGET=${{ matrix.docs-target }}