ci: build directly instead of using repro-build docker wrapper

The sysbox DinD runner cannot nest another docker container due to
procfs restrictions. Build directly using bitbake in the runner
container which already has all build dependencies.

Author: kvinwang

.github/workflows/build-guest.yml

@@ -19,16 +19,31 @@ jobs:
         with:
           submodules: recursive
 
-      - name: Reproducible build
-        run: cd repro-build && ./repro-build.sh -n
+      - name: Build guest images
+        run: |
+          source dev-setup bb-build
+          make dist DIST_DIR=$PWD/dist BB_BUILD_DIR=$PWD/bb-build
+
+      - name: Generate reproduce.sh
+        run: |
+          cat > dist/reproduce.sh <<EOF
+          #!/bin/bash
+          set -e
+          git clone https://github.com/Dstack-TEE/meta-dstack.git
+          cd meta-dstack/
+          git checkout ${{ github.sha }}
+          git submodule update --init --recursive
+          cd repro-build && ./repro-build.sh -n
+          EOF
+          chmod +x dist/reproduce.sh
 
       - name: Upload artifacts
         uses: actions/upload-artifact@v4
         with:
           name: guest-images
           path: |
-            repro-build/dist/*.tar.gz
-            repro-build/dist/reproduce.sh
+            dist/*.tar.gz
+            dist/reproduce.sh
           retention-days: 30
 
       - name: Create tag and release
@@ -40,6 +55,6 @@ jobs:
           git tag "$TAG"
           git push origin "$TAG"
           gh release create "$TAG" \
-            repro-build/dist/*.tar.gz \
-            repro-build/dist/reproduce.sh \
+            dist/*.tar.gz \
+            dist/reproduce.sh \
             --title "$TAG" --generate-notes