Tier 2 trace projection does not insert necessary guards

Tier 2 trace projection can project traces through branches, calls, etc.
Currently we rely on the tier 1 instruction definition to perform the necessary checks, but this is flawed.

Consider a perfectly valid specialization of calls to class, that checked merely that the callable was a class.
This would be a perfectly valid instruction and will work flawlessly in tier 1, but will be wrong in a tier 2 trace that assumes a specific class.
Tier 2 trace projection needs to insert the necessary guards.

A lot of these extra guards will be redundant, but we can rely on the optimizer to remove them.

Repérez les points d’entrée de la projection des traces de Tier 2 et comparez-les aux définitions d’instructions de Tier 1, en vous concentrant sur les branches et les appels. Définissez les cas de garde manquants, puis vérifiez que les traces projetées restent correctes lorsqu’une instruction spécialise un callable pour une classe spécifique, y compris la couverture des gardes redondants supprimés par l’optimisation.