GitLab

Otherwise, `make documentation` fails in the devcontainer.

Our VS Code devcontainer is based on our buildenv container, so we directly modify the latter.

Before this, if registry or tag got set, we would still build all images
starting from the docker hub regsitry version and latest tag.

This will push the images built by docker-images and docker-images-debug
target, if they exist.

This will result in make docker-images directly generating images with
appropriate tags.

simbricks/simbricks additionally with gem5.opt installed in addition to
gem5.fast. About 1.1GB larger.

(this image takes very long to build)

High-level idea is to separate a out a base-protocol and library that
the PCIe and network protocols layer over. The base-protocol includes
synchronization and the basics of setting up queues, and transferring
messages. So this will enable us to build protocol-agnostic pieces like
proxies, loggers etc. A secondary goal down the line is to remove the
fixed roles of  "nics listen on pcie & network" while hosts and networks
connect, instead making this dynamic.

Unfortunately this is a big change touching just about every piece
interfacing with simbricks. So this is also consolidating and
restructuring our simbricks libraries and adapters, reducing copying of
code etc. After this commit all simulators, ours and external ones, are
broken till the respective commits fixing them.