[ci] Split gitlab-ci config to separate files (#6031)

* [WIP][ci] Split gitlab-ci config to separate files

* add stage

* move short benches

* rename stage short_benchmark

* include short-benchmarks

* add check

* add test stage

* quickfix check-no-default-features

* add build stage

* add weights and publish

* rename stage

* rename stage

* fix publish miner image

* fix publish miner image

* add dag

* fix image

* start build-short-benchmark with the pipeline

* some more DAGs

* empty line to short-benchmarks

* add change from master

Co-authored-by: parity-processbot <>