EVM benchmark utilities (#8944)

* Make it possible to expose jsontests using feature flag

* Add start_stop_hook for jsontests

* Fix evmbin compile

* Implement vm jsontests times to tsv result

* Use /usr/bin/env to avoid errors on non-Debian systems

* Move evmbin/bench.sh to scripts and add vm_jsontests script for convenience

* Add tempdir as required deps for test-helpers

* Address grumbles on comments

* Detect file/folder automatically and add command docs

* Fix bench script

* times -> timings

* typo: wrong if condition