fix: set threshold to model tolerance when solution is infeasible

[carrascomj]

• [x] description of bug The growth tests with experimental data do not work when, after applying the medium, the solver returns infeasible, propagating a NaN to the growth comparison that hampers the tests (reports 0 for all metabolites).
• [x] description of feature/fix Now the user can provide an absolute value in the experiments.yml configuration as minimum growth that acts both on essentiality and growth experiments. If no value is provided, it defaults to a coefficient (set as 10% for now) of the growth under default constraints.
• [ ] tests added/passed
• [x] document min_growth
• [x] add an entry to the next release

[codecov[bot]]

Codecov Report

Merging #684 into develop will decrease coverage by 0.16%. The diff coverage is 82.35%.

@@             Coverage Diff             @@
##           develop     #684      +/-   ##
===========================================
- Coverage    83.10%   82.94%   -0.17%     
===========================================
  Files           49       49              
  Lines         2640     2650      +10     
  Branches       431      433       +2     
===========================================
+ Hits          2194     2198       +4     
- Misses         355      360       +5     
- Partials        91       92       +1     

Impacted Files	Coverage Δ
src/memote/experimental/config.py	80.32% <72.72%> (-0.76%)	:arrow_down:
src/memote/experimental/essentiality.py	90.00% <100.00%> (-0.33%)	:arrow_down:
src/memote/experimental/experiment.py	82.35% <100.00%> (+1.10%)	:arrow_up:
src/memote/experimental/experimental_base.py	84.21% <100.00%> (ø)
src/memote/experimental/growth.py	78.12% <100.00%> (-0.67%)	:arrow_down:
src/memote/suite/cli/reports.py	75.55% <0.00%> (-2.23%)	:arrow_down:

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[Midnighter]

Cheers, thank you for your quick work. :slightly_smiling_face: