Draft: Alveo support

Build xrt with Alveo card support

• add -DXRT_ALVEO=1 flag to cmake
• create xrt-xocl-dkms package
• update install rules for additional headers and scripts

Missing features:

• xrt-aws dkms module is not packaged
• mpd and msd services are not installed
• firmware is not built, so card support packages can not be installed

Two additional commits add dh_bash-completion support and fix CLI tests that require temporary intstall into build directory.

This merge request is draft becouse it needs XRT source from master or 2025.2 branch.