1. Move the generated file to handlers - it better belongs there
2. Ensure that all file serves are also handled by the asset store
Co-authored-by: Marcos Lilljedahl <marcosnils@gmail.com>
Generate these assets in config because this package is imported by
most.
Add internal/addgenheader as a simple helper because go-bindata doesn't
output the write header.
Also update test CI workflow to regenerate and check commit is clean.