CI upgrade

This MR improves the CI script in Allen by introducing the following features:

• CUDA and CPU builds are now possible.
• A node with an E5-2630v4 has been configured to run the CPU test.
• When run in CPU mode, the CPU model of the server is parsed and printed.
• Two reference files are added, for the CPU (ivybridge build) and for the CUDA build.
• A new stage Test has been created. For the moment, the BsPhiPhi output is checked against reference files. The script fails if the diff is not empty.
• The CI script now notifies the branch producing the results.
• It is now possible to define Release, Debug or RelWithDebInfo builds in the CI script.
• It is now possible to add any options to the job. Ie. job CUDA:DefaultSequence:Debug:-DUSE_ROOT=ON:build will build a CUDA target, sequence DefaultSequence, type Debug, with option -DUSE_ROOT=ON.
• The tag cuda refers to any server with a GPU.
• The gpu gpu0 will execute in whatever first GPU is on a system. gpu1 will do the same with the second GPU.
• gpu0 and gpu1 both are assumed to be LOW capability devices.
• Jobs for a Debug CUDA build, a Debug -DUSE_ROOT=ON CUDA build, and respective runs, have been added.
• -DCPU=ON and -DHIP=ON become -DTARGET_CPU=ON and -DTARGET_HIP=ON.