add function to get random seed

[jd-lara]

This is a step to make sure that over the whole platform the same random seed is used and allows the user to create an ENV variable for reproducibility if they want to.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 79.16%. Comparing base (711caa4) to head (9e83894). Report is 13 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #457      +/-   ##
==========================================
+ Coverage   77.79%   79.16%   +1.36%     
==========================================
  Files          71       72       +1     
  Lines        5818     5744      -74     
==========================================
+ Hits         4526     4547      +21     
+ Misses       1292     1197      -95     

Flag	Coverage Δ
unittests	79.16% <100.00%> (+1.36%)	:arrow_up:

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Files with missing lines	Coverage Δ
src/InfrastructureSystems.jl	55.55% <ø> (ø)
src/random_seed.jl	100.00% <100.00%> (ø)

... and 5 files with indirect coverage changes

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[GabrielKS]

If we go with this approach, might be convenient to have a setter too.

[jd-lara]

If we go with this approach, might be convenient to have a setter too.

I don't think that we can set a env variable from a function like this