* Dailymotion Bid Adaptor: initial release

* .md file lint issue resolved

* Dailymotion Bid Adaptor: build bidder request based on param with fallbacks

* Dailymotion Bid Adaptor: support video metadata

* Dailymotion Bid Adaptor: add support for sending adUnitCode

* Dailymotion Bid Adaptor: add support for sending startDelay

* feat(LEO-528): Allow multiple IAB categories in video metadata

The same way as we can have an array of IAB categories level 1 in the ORTB request, this PR introduces an array for the IAB categories level 2.

To be forward compatible with level [2.2](https://github.com/InteractiveAdvertisingBureau/Taxonomies/blob/main/Content%20Taxonomies/Content%20Taxonomy%202.2.tsv) and [3.0](https://github.com/InteractiveAdvertisingBureau/Taxonomies/blob/main/Content%20Taxonomies/Content%20Taxonomy%203.0.tsv) specifications, the category IDs should be sent as strings.

* Dailymotion bid adapter: Clarify the video metadata to provide in each player context

* Dailymotion bid adapter: Move API key to bid params

* Dailymotion bid adapter: Verify API key is string

Co-authored-by: Rumesh <rumesh@users.noreply.github.com>

* Dailymotion bid adapter: Move API key to bid params (fix tests)

* Dailymotion Bid Adaptor: add gpp support and get coppa from request

* Dailymotion Bid Adaptor: fix lint error

* Dailymotion Bid Adaptor: add iabcat1 and fallback to ortb2 for iabcat2

* Dailymotion Bid Adaptor: get iabcats from ortb2.site.content.data

---------

Co-authored-by: Kevin Siow <kevin.siow@dailymotion.com>
Co-authored-by: Aditi Chaudhary <aditichaudhary175@gmail.com>
Co-authored-by: Sébastien Millet <sebastien.millet@dailymotion.com>
Co-authored-by: Rumesh <rumesh@users.noreply.github.com>

Co-authored-by: adish.r <adish.r@media.net>

# Conflicts:
#	modules/dailymotionBidAdapter.js
#	modules/dailymotionBidAdapter.md
#	test/spec/modules/dailymotionBidAdapter_spec.js