fix(ci): install build dependencies for Linux dev builds in bendpy action

The test_bendpy job runs on a bare self-hosted ARM64 runner without
clang/build-essential installed. Add a setup step that runs dev_setup.sh
to install build dependencies and sets JEMALLOC env vars for Linux
development builds, matching what the macOS path already does.

Author: bohutang

.github/actions/build_bindings_python/action.yml

@@ -55,6 +55,18 @@ runs:
         echo "JEMALLOC_SYS_WITH_LG_PAGE=14" >> $GITHUB_ENV
         echo "JEMALLOC_SYS_WITH_MALLOC_CONF=oversize_threshold:0,dirty_decay_ms:5000,muzzy_decay_ms:5000" >> $GITHUB_ENV
 
+    - name: Setup build dependencies for Linux
+      if: contains(inputs.target, '-linux') && inputs.version == ''
+      shell: bash
+      run: |
+        bash ./scripts/setup/dev_setup.sh -yb
+        if [[ "${{ inputs.target }}" == aarch64-* ]]; then
+          echo "JEMALLOC_SYS_WITH_LG_PAGE=16" >> $GITHUB_ENV
+        else
+          echo "JEMALLOC_SYS_WITH_LG_PAGE=14" >> $GITHUB_ENV
+        fi
+        echo "JEMALLOC_SYS_WITH_MALLOC_CONF=oversize_threshold:0,dirty_decay_ms:5000,muzzy_decay_ms:5000" >> $GITHUB_ENV
+
     - name: Setup uv
       uses: astral-sh/setup-uv@v5
       with: