Consolidate the integration framework tooling

[ferranbt]

Right now we have three similar frameworks to do integration tests in rbuilder, op-rbuilder and rollup-boost.

These frameworks cover two main things:

• Run, clean, and log the execution of binaries during the integration tests.
• Mock the CL node for op-rbuilder.

We should consolidate all these efforts into a single crate inside rbuilder that can be consumed by all the other components.