Update test-runner api (#9302)

* better apis

* ....

* ...

* Genensis -> UnimportedGenesis

* adds rpc for runtime upgrades

* simplify test-runner

* clean up test-runner api

* remove unused imports

* fix doc-test

* fix line width

* correct Node::clean

* correct Node::clean

* add deny rules

* remove unused extern crates

* remove mutex from node

* Update test-utils/test-runner/Cargo.toml

Co-authored-by: Andronik Ordian <[email protected]>

* adds docs, removes Node::clean

Co-authored-by: Andronik Ordian <[email protected]>
Co-authored-by: Seun Lanlege <[email protected]>