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 or много информаций 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/найденной/полученной
информацией or всей информацией, которую/которая/которой ...
etc. So информация requires some type of specification.
And also because the very notion of relishing information is pretty quaint.