Bugfix: ensure correct dealiasing of lattices in attach

[pablosanjose]

Reverts #319

The fix in #319 was wrong. It made copy_lattice(ph::ParametricHamiltonian) copy the lattices of the parent and the embedded Hamiltonian, instead of only the parent one. In fact, the right fix is to copy only the embedded Hamiltonian because transform and translate modify lattice(ph) = lattice(hamiltonian(ph)) only, not lattice(parent(ph)), which must remain untouched. As a result the two lattices need not coincide in general.

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.47%. Comparing base (437e522) to head (3c39b75).

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #321      +/-   ##
==========================================
- Coverage   92.47%   92.47%   -0.01%     
==========================================
  Files          39       39              
  Lines        6912     6906       -6     
==========================================
- Hits         6392     6386       -6     
  Misses        520      520              

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