[BuildStream] A subgroup for our benchmarking

[James Ennis <james ennis codethink co uk>]

Hi all,

I would like to propose that we create a new "benchmarks" subgroup in 
BuildStream and move the existing three benchmarking-related repos 
inside it. In addition to this, I have some benchmarking-related repos 
in my own namespace, I would also like to move these here, as these are 
what we use for the weekly updates.

The current three repos I'm suggesting we move into this subgroup are:

1. benchmarks [0]
2. bst-benchmarking-bot [1]
3. buildstream-benchmarking.gitlab.io [2]

I would like to move the following repos (which are in my own 
namespace):

1. benchmark_debian - the repo which runs a weekly CI job to generate 
the benchmarking results [3]
2. debian-stretch-bst - contains the debian-like project [4]
3. bst-benchmarks-notebooks - the repo we publish the notebook to [5]
    - I'm actually hoping to collapse this into benchmark_debian next 
week, but if I don't manage, we should add it to the subgroup
4. bst-performance-scaling - A repo which tests how BuildStream's 
performance scales with size [6]

One caveat might be that we already have a "benchmarks" repo, so perhaps 
we call the subgroup "benchmarks-tooling" or simply "benchmarking".

Please let me know your thoughts,
Thanks,
James

[0] https://gitlab.com/BuildStream/benchmarks
[1] https://gitlab.com/BuildStream/bst-benchmarking-bot
[2] https://gitlab.com/BuildStream/buildstream-benchmarking
[3] https://gitlab.com/jennis/benchmark_debian
[4] https://gitlab.com/jennis/debian-stretch-bst
[5] https://github.com/james-ennis/bst-benchmarks-notebooks
[6] https://gitlab.com/jennis/bst-performance-scaling