Remove duplicate computation from block expansion

[daemontus]

Copy the known stable motifs into the inner succession diagram instead of re-computing.

This is a very minor change just to avoid some duplicate computations in large networks when doing block expansion.

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
biobalm
_pint_reachability.py	61	50	18%	24, 40–54, 69–93, 101–146
control.py	114	14	88%	107, 119, 125, 129, 134, 143–159, 477, 480, 493
interaction_graph_utils.py	52	6	88%	11–13, 151–152, 222–223
petri_net_translation.py	149	11	93%	22–26, 79, 136, 308–309, 333–334, 343, 452
space_utils.py	132	20	85%	26–28, 104–110, 133–139, 347–350, 414, 462
succession_diagram.py	379	65	83%	6, 120, 210–215, 228, 275–282, 386–393, 410–411, 421, 427, 543, 630–636, 752, 755, 873–891, 923, 933, 936, 976, 983, 1034, 1048, 1170, 1329, 1340, 1348, 1376, 1391, 1403, 1408, 1414
symbolic_utils.py	32	5	84%	10, 39–44, 100, 128
trappist_core.py	184	27	85%	14–18, 55, 57, 92, 215, 217, 219, 247–250, 254–256, 276–282, 340, 342, 372, 420, 422
biobalm/_sd_algorithms
expand_attractor_seeds.py	60	7	88%	6, 28, 42, 109–114, 119
expand_bfs.py	28	1	96%	6
expand_dfs.py	30	1	97%	6
expand_minimal_spaces.py	37	2	95%	6, 31
expand_source_SCCs.py	111	16	86%	11–13, 50, 69, 77, 82, 103, 112, 120, 131, 140, 143, 167, 179, 242–243
expand_source_blocks.py	111	13	88%	11, 26, 41, 49, 54, 78, 128, 154, 163, 196, 206, 212, 221
expand_to_target.py	31	3	90%	6, 38, 43
biobalm/_sd_attractors
attractor_candidates.py	265	90	66%	13–15, 26–27, 93, 101, 107–108, 130, 152, 187, 193–204, 223, 239–320, 325, 329, 335, 341, 356, 383, 388, 392, 398, 400–438, 511, 582–583, 684
attractor_symbolic.py	114	16	86%	6–7, 75, 88–92, 103, 112, 144, 179, 191–193, 202, 230, 236
TOTAL	1977	347	82%

Tests	Skipped	Failures	Errors	Time
359	0 💤	0 ❌	0 🔥	1m 31s ⏱️

[daemontus]

I'll just merge this right away since the tests are passing and it is otherwise a minor change.