quvi/youtube.lua: normalize: Revise, remove "nocookie" handling
quvi/youtube.lua: normalize: Revise, remove "nocookie" handling

Revise:
* Remove youtube-nocookie.com handling (no longer operational)
* Add test_normalize function for testing purposes
* Improve code readability

Signed-off-by: Toni Gundogdu <eac2284b3c43676907b96f08de9d3d52d5df0361@gmail.com>

legatvs/libquvi-scripts,legatvs/libquvi-scripts,alech/libquvi-scripts,alech/libquvi-scripts