If that character is resurrected, for example with the Revivify or Raise Dead spells, will their attunement be restored along with their life?
No. If a character dies they lose the attunement as stated in the rules you quote. They will then have to re-attune to every item they were previously attuned to, which may not be possible if someone else has already done so in the intervening time or some other prerequisite has changed.
An exception would be a Wish spell used to re-create a Resurrection effect but with an additional "and re-attuned to all their items" clause, basically by changing all the pre-requisites to what they need to be and de-attuning anyone who attuned to the items in the meantime. However be careful with the wording as a clever DM will take you literally and there may be some un-desired consequences. Also this would be an effect that had the more dramatic consequences to the caster of making a Wish as it is beyond merely duplicating a spell.