Data partitioning

[JulienPeloton]

IMPORTANT: Please create an issue first before opening a Pull Request.
Linked to issue(s): Closes #526

What changes were proposed in this pull request?

This PR does 2 things:

• compute partitioning columns only if needed
• fix bug in the path for raw2science_batch

How was this patch tested?

Cloud

[sonarcloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
83.8% Duplication

[codecov]

Codecov Report

Merging #528 (fcb41bc) into master (c6f572f) will decrease coverage by 0%.
The diff coverage is 90%.

@@          Coverage Diff          @@
##           master   #528   +/-   ##
=====================================
- Coverage      95%    95%   -1%     
=====================================
  Files          20     20           
  Lines         991    999    +8     
=====================================
+ Hits          944    951    +7     
- Misses         47     48    +1     

Impacted Files	Coverage Δ
bin/raw2science.py	95% <90%> (-2%)	⬇️

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