It's not countable, but the nouns вся / половина / часть don't imply countability and so are totally permissible in combination with информация.
What you can't say is две информации and the like.
As far as the expression я наслаждался всей информацией is concerned, it doesn't really sound idiomatic albeit being fully comprehensible. Not because of the presence of всей, but because it's lacking a complement such as всей этой информацией or всей информацией, которую/которая/которой ... etc. So информация requires some type of specification.