Make Importing Authorization Logic More Self-Contained

[aferr]

Currently using the rust implementation of authorization logic requires additional dependencies to be installed as shown here. For example, a souffle binary is built using a separate bazel rule, and the github workflow is modified to install mcpp.

It would be easier for other projects to use authorizaiton logic if it is possible to use a single bazel rule.

One way to do this could be to write a single bazel rule that collects all of the dependencies and just allows consumers to use this one rule.

Another way (or just a way to make the above option simpler) could be to implement the authorization logic compiler so that it uses the (C++) Souffle library rather than invoking it as a separate binary. This is probably best to do only for the C++ implementation of authorization logic.

[aferr]

cc: @tiziano88

[aferr]

One way to improve this could just be to package the rule needed to build souffle and its dependencies into a .bzl file and include this .bzl in a released archive from the raksha repository. This should allow us to import souffle and the related dependencies with just something like:

http_archive(
     name = "raksha_deps",
     ...
)
load("@raksha_deps//raksha_deps:raksha_deps.bzl, "raksha_register_toolchains")

Flex provides a release like this one that can be used as an example. See flex.bzl and flex_register_toolchains in https://github.com/jmillikin/rules_m4/releases/download/v0.2/rules_m4-v0.2.tar.xz