malus: add the nemesis use cases

[drahnr]

Initial draft of a concrete nemesis impl

• finalize malus node impl
• add a docker file for usage /w gurke
• extend by gurke configs
  • add tera to get good coverage around thresholds
• unify dir layout: simnet_tests with node/malus/integrationtests have some shared ideas, docs, and content. defered, need to clarify the intended scope of simnet_tests

[drahnr]

Not sure what's happening, but I hit

  |
  = help: This is a known issue with the compiler. Run `cargo clean -p westend_runtime` or `cargo clean` to allow your project to compile
  = note: Please follow the instructions below to create a bug report with the provided information
  = note: See <https://github.com/rust-lang/rust/issues/84970> for more information

thread 'rustc' panicked at 'Found unstable fingerprints for evaluate_obligation(87dcc842a9ce649f-5ba6d09e73d8d6c1): Ok(EvaluatedToOk)', /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/compiler/rustc_query_system/src/query/plumbing.rs:620:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

error: internal compiler error: unexpected panic

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.54.0 (a178d0322 2021-07-26) running on x86_64-unknown-linux-gnu

note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -C incremental --crate-type lib

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
#0 [evaluate_obligation] evaluating trait selection obligation `pallet_transaction_payment::ChargeTransactionPayment<Runtime>: sp_runtime::traits::SignedExtension`
#1 [normalize_projection_ty] normalizing `Canonical { max_universe: U0, variables: [], value: ParamEnvAnd { param_env: ParamEnv { caller_bounds: [], reveal: All }, value: ProjectionTy { substs: [sp_runtime::generic::Block<sp_runtime::generic::Header<u32, sp_runtime::traits::BlakeTwo256>, sp_runtime::generic::UncheckedExtrinsic<sp_runtime::MultiAddress<sp_runtime::AccountId32, ()>, Call, sp_runtime::MultiSignature, (frame_system::CheckSpecVersion<Runtime>, frame_system::CheckTxVersion<Runtime>, frame_system::CheckGenesis<Runtime>, frame_system::CheckMortality<Runtime>, frame_system::CheckNonce<Runtime>, frame_system::CheckWeight<Runtime>, pallet_transaction_payment::ChargeTransactionPayment<Runtime>)>>], item_def_id: DefId(213:1595 ~ sp_runtime[8ec7]::traits::Block::Extrinsic) } } }`
end of query stack
error: aborting due to previous error

awefully lot. Every second compile I have to clean all runtime artifacts.

[drahnr]

If we want part of the changes to live within the polkadot repo, please create a new PR with the relevant changes. Thank you!