Relax deduce_pspaces

[VictorVanthilt]

I relaxed deduce_pspaces to make the user able to define an operator on a lattice without having to fully specify an operator on each site using @mpoham.
The behaviour now is the following:

• If you supply an operator on every site no behaviour is changed since before.
• If you only supply @mpoham with operators acting upon some of the lattice sites it will now either:
  1. Assume all sites have the same local Hilbert space if all the supplied operators have the same local Hilbert space.
  2. Error if the supplied operators have a different local Hilbert space.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Files with missing lines	Coverage Δ
src/operators/mpoham.jl	94.23% <100.00%> (+2.92%)	⬆️

... and 1 file with indirect coverage changes

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[lkdvos]

Thanks! Will merge once tests pass.