fix: make name unresolution consistent and avoid auxiliary names #6938
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This PR ensures that names suggested by
simp?are not shadowed by auxiliary declarations in the local context.This PR moves
unresolveNameGlobalAvoidingLocalsinto theTermnamespace and restricts it toTermElabM, since it is impossible to correctly resolve some auxiliary declarations (e.g., in amutualblock) without access to theauxDeclToFullNamemap in theTermElabMcontext. It also addsauxDeclToFullNameto theSavedContextfor postponed expressions, which ensures that (un)resolution of auxiliary-declaration names is consistent between terms and tactic blocks (previously, it was not possible to refer to certain auxiliary declarations by suffixes in a tactic block).Closes #6706.