investigate using benchmark-action to track history of benchmarks for ixa

[cdc-as81]

https://github.com/benchmark-action/github-action-benchmark
example charts: https://benchmark-action.github.io/github-action-benchmark/dev/bench/

[cdc-as81]

we ended up not using the github-action-benchmark , but implementing something very similar.
We are using the existing benchmarks workflow, once the branch benchmarks are done we convert the results to json and add them to the exisiting historic results.
historic results are stored in a 'benchmarks-history' branch.