[CI] refactor benchmark (#1235)

* [WIP][CI] refactor benchmark

* change image for benches

* disable job

* fix docker image

* fix ws var

* fwd output to file

* fix var

* rm bench for kusama and westend

* set log-level info

* mv benchmarks to artifacts

* publish results to prom

* fix typo, add some echoes

* substitute curly brackets

* fix naming

* return pipeline

* rename build jobs