[GLUTEN-5179][VL]Only build gluten cpp in builddeps-veloxbe.sh

### Description
When build this project use velox, it will take a long time to build with velox, even if there is no change.

If only the gluten is modified, building the gluten separately will be more efficient.

Start by reading builddeps-veloxbe.sh and trace how it currently builds Velox and Gluten. Adjust the build flow so Gluten's C++ code can be built separately when only Gluten changes, then run the script to verify it avoids rebuilding unchanged Velox dependencies.

Written by the indexing model from the issue text.