[viu:ott] Fix extractor (see desc)

[viu:ott] Fix extractor (see desc)
* add language_flag_id query param
* add support for premium account (untested since I dont have a premium account)
* support entire series

Code from:
https://github.com/blackjack4494/youtube-dlc/pull/211
https://github.com/ytdl-org/youtube-dl/pull/15182
https://github.com/ytdl-org/youtube-dl/pull/26775

Fixes:
https://github.com/yt-dlp/yt-dlp/issues/219
https://github.com/ytdl-org/youtube-dl/issues/27946
https://github.com/ytdl-org/youtube-dl/issues/27863
https://github.com/ytdl-org/youtube-dl/issues/27812
https://github.com/ytdl-org/youtube-dl/issues/27464
https://github.com/ytdl-org/youtube-dl/issues/26788
https://github.com/blackjack4494/yt-dlc/issues/136

Possibly also fixes (untested):
https://github.com/ytdl-org/youtube-dl/issues/16992
https://github.com/ytdl-org/youtube-dl/issues/26701

Co-authored by: lkho, pukkandan