* WIP redo how we parse and use modes
* test expanding, too
* WIP integrate new Mode/ParsedMode into rest of code
* First pass integrated new mode bits
* fmt
* clippy
* Remove mode we no longer support from test metadata
* Address nits
* Add ability for compiler to opt out if it can't work with some Mode/version
* Elide viaIR input if compiler does not support it
* Improve test output a little; string modes and list ignored tests
* Move Mode to common crate
* constants.mod, and Display for CaseIdx to use it
* fmt
* Rename ModePipeline::E/Y
* Re-arrange Mode things; ParsedMode in format and Mode etc in common
* Move compile check to prepare_tests
* Remove now-unused deps
* clippy nits
* Update fallback tx weights to avoid out of gas errors
* Update kitchensink weights too and fmt
* Bump default geth timeout to 10s
* 30s timeout
* Improve geth stdout logging on failure
* fix line logging
* remove --networkid and arg, back to 5s timeout for geth
James Wilson