Adds MPI scheduling support

[GitHK]

What do these changes do?

Allow the user to schedule services on MPI nodes. Please check proposed implementation in the liked issue.

Note: In development mode, the sidecar_mpi service will be spawned as an MPI node. This is done by setting the TARGET_MPI_NODE_CPU_COUNT environment variable to the number of CPUs of the host.

Related issue number

Closes #1672

How to test

Create a Study and add at least one copy of the following computational: sidecar, sidecar-gpu and sidecar-mpi.
Press play and check the logs of the sidecar_mpi swarm service.

Checklist

• Did you change any service's API? Then make sure to bundle document and upgrade version (make openapi-specs, git commit ... and then make version-*)
• Unit tests for the changes exist
• Runs in the swarm
• Documentation reflects the changes
• New module? Add your github username to .github/CODEOWNERS

[codecov]

Codecov Report

Merging #1673 into master will decrease coverage by 0.3%.
The diff coverage is 36.1%.

@@           Coverage Diff            @@
##           master   #1673     +/-   ##
========================================
- Coverage    73.6%   73.3%   -0.4%     
========================================
  Files         278     279      +1     
  Lines       10923   11010     +87     
  Branches     1179    1189     +10     
========================================
+ Hits         8050    8078     +28     
- Misses       2530    2589     +59     
  Partials      343     343             

Flag	Coverage Δ
#integrationtests	56.3% <25.0%> (-0.5%)	⬇️
#unittests	67.1% <35.2%> (-0.3%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
.../director/src/simcore_service_director/producer.py	62.5% <0.0%> (-0.4%)	⬇️
...es/sidecar/src/simcore_service_sidecar/mpi_lock.py	27.2% <27.2%> (ø)
...src/simcore_service_sidecar/celery_configurator.py	49.3% <30.7%> (-6.1%)	⬇️
...rvices/sidecar/src/simcore_service_sidecar/core.py	77.5% <50.0%> (ø)
...vices/sidecar/src/simcore_service_sidecar/utils.py	89.8% <72.7%> (-3.4%)	⬇️
...ices/sidecar/src/simcore_service_sidecar/config.py	100.0% <100.0%> (ø)
...r/src/simcore_service_webserver/computation_api.py	65.6% <100.0%> (+0.2%)	⬆️
...es/sidecar/src/simcore_service_sidecar/rabbitmq.py	89.7% <0.0%> (-3.0%)	⬇️

[sanderegg]

hmm are you sure all these changes are needed? well not that I care too much but maybe for next time there is a way to only update the library you add doing something like:

make reqs update=NAMEOFLIBRARY

[GitHK]

I've actually added that library because I need it. Not happy about it, but the async version was the better one

[sanderegg]

I get that, I am a bit astonished that so many changes come in which is why I thought you updated more than just the aioredlock. whatever that is minor and if it's green it's green!

[GitHK]

My guess is that this project is not covered by depbot, so when I've updated with these 2 libraries, all others got updated.

[mguidon]

Looks good. Sorry, I thought I already approved minus the wrong label in the sleeper.

[GitHK]

adresses #1507