Take advantage of workspace in CI BSP build script

Author: jbeaurivage

.github/workflows/build-bsp.yml

@@ -41,11 +41,9 @@ jobs:
 
     - name: Build ${{ matrix.bsp.name }}
       run: |
-        build_invocation=$(cat ./crates.json | jq -Mr --arg board '${{ matrix.bsp.name }}' -c '.boards | .[$board] | .build')
         set -ex
-        pushd boards/${{ matrix.bsp.name }}
-        $(${build_invocation})
-        popd
+        build_invocation=$(cat ./crates.json | jq -Mr --arg board '${{ matrix.bsp.name }}' -c '.boards | .[$board] | .build')
+        $("${build_invocation} -p ${{ matrix.bsp.name }}")
         mkdir -p output
         touch "output/build"
 
@@ -55,8 +53,7 @@ jobs:
         set -ex
         build_invocation=$(cat ./crates.json | jq -Mr --arg board '${{ matrix.bsp.name }}' -c '.boards | .[$board] | .build')
         clippy_invocation=$(echo ${build_invocation} | sed 's/cargo build/cargo clippy/g')
-        cd boards/${{ matrix.bsp.name }}
-        $(${clippy_invocation})
+        $("${clippy_invocation} -p ${{ matrix.bsp.name }}")
 
     - name: Done
       uses: actions/upload-artifact@v4