Remove *_partitions from graph object

[abelsiqueira]

Remove rep_periods_partitions and timeframe_partitions from graph assets and flows objects.
#610 is not necessary anymore after that.
In the future, this code might be useful for user-friendly input.

Blocked by #928

Closes #610

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.42%. Comparing base (f7440b9) to head (eebec8b).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #939      +/-   ##
==========================================
- Coverage   95.76%   91.42%   -4.34%     
==========================================
  Files          30       30              
  Lines        1110     1085      -25     
==========================================
- Hits         1063      992      -71     
- Misses         47       93      +46     

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[github-actions]

Benchmark Results

	f7440b9...	eebec8b...	f7440b9.../eebec8beb2338d...
energy_problem/create_model	41.3 ± 0.86 s	42.9 ± 1.5 s	0.963
energy_problem/input_and_constructor	15.1 ± 0.38 s	14.1 ± 0.3 s	1.07
time_to_load	3.94 ± 0.089 s	3.9 ± 0.011 s	1.01

	f7440b9...	eebec8b...	f7440b9.../eebec8beb2338d...
energy_problem/create_model	0.664 G allocs: 21.1 GB	0.664 G allocs: 21.1 GB	1
energy_problem/input_and_constructor	0.0562 G allocs: 2.17 GB	0.043 G allocs: 1.67 GB	1.3
time_to_load	0.159 k allocs: 11.2 kB	0.159 k allocs: 11.2 kB	1

Benchmark Plots

A plot of the benchmark results have been uploaded as an artifact to the workflow run for this PR.
Go to "Actions"->"Benchmark a pull request"->[the most recent run]->"Artifacts" (at the bottom).

[datejada]

Thank you for the PR. LTGM.