mgidBidAdapter: Add gpid value to bid request's imp[].ext

[Gaudeamus]

Type of change

• Updated bidder adapter

Description of change

Adding gpid value for each bid request impression. No api changes

[github-actions]

Whoa there, partner! 🌵🤠 We wrangled some duplicated code in your PR:

• modules/mgidBidAdapter.js has 12 duplicated lines with modules/redtramBidAdapter.js
• modules/mgidBidAdapter.js has 39 duplicated lines with modules/mgidXBidAdapter.js
• modules/mgidBidAdapter.js has 8 duplicated lines with modules/mgidXBidAdapter.js
• modules/mgidBidAdapter.js has 18 duplicated lines with modules/mgidXBidAdapter.js
• modules/mgidBidAdapter.js has 18 duplicated lines with modules/undertoneBidAdapter.js
• modules/mgidBidAdapter.js has 7 duplicated lines with modules/mgidBidAdapter.js
• modules/adtrueBidAdapter.js has 8 duplicated lines with modules/mgidBidAdapter.js
• modules/adtrueBidAdapter.js has 25 duplicated lines with modules/mgidBidAdapter.js
• modules/adtrueBidAdapter.js has 9 duplicated lines with modules/mgidBidAdapter.js

Reducing code duplication by importing common functions from a library not only makes our code cleaner but also easier to maintain. Please move the common code from both files into a library and import it in each. Keep up the great work! 🚀

[Gaudeamus]

Hello, as to deduplicating issue, I can't address it right now, and I will schedule time for this in the next sprints as it is unexpected task for the scope I've committed.
For now can we please proceed as it is?

[Gaudeamus]

also, please explain how I should remedy the following, for both adapters are the same:

modules/mgidBidAdapter.js has 7 duplicated lines with modules/mgidBidAdapter.js

[patmmccann]

also, please explain how I should remedy the following, for both adapters are the same:

modules/mgidBidAdapter.js has 7 duplicated lines with modules/mgidBidAdapter.js

You do the same thing in each of those two cases. Define the constant you want outside of the switch and use it twice, or use an or inside your switch

[patmmccann]

Thanks for your attention on this matter soon, merging