This commit updates mocks and reenables the test invalidId of the NotAvailable class of the YoutubePlaylistExtractorTest class beacuse with the youtubei/innertube API, it returns "Not found" and doesn't redirect to the YouTube homepage.
The expectedMetaInfo test of the MetaInfoTest class of the YoutubeSearchExtractorTest class was broken because YouTube removes the vaccine progress link of the WHO from the meta info so this commit removes it and the test is now passing.
Add the origin and the referer headers with the https://www.youtube.com value for YouTube JSON POST requests.
Don't add the consent cookie header for the requests which use the youtubei/innertube API because it's uneeded.
Fix some tests and update YouTube mocks