[YouTube] Get visitorData for player requests if not provided and do some fixes

visitorData are get using InnertubeClientRequestInfo and
YoutubeParsingHelper.prepareJsonBuilder, which is replacing the
corresponding method in YoutubeStreamHelper, removed in this commit.

Also fix some bugs like JsonBuilder usages in some places and remove
HLS manifest filtering for the iOS client, as we still use for now
the full player response, in the case having streams requiring poTokens
after some time as a last resort is useful.

Author: AudricV