Unify formatting query string functions

[JoshuaRogan]

Type of issue

Feature Request

Description

Currently, there are two separate functions which transform properties into a formatted query string:

https://github.com/prebid/Prebid.js/blob/master/src/utils.js#L111-L118
https://github.com/prebid/Prebid.js/blob/master/src/utils.js#L841-L848--> Doesn't properly encode (Fixed: Quick Fix Downstream)

Ideally, we should not be using multiple query string formatting functions. This would be a good opportunity to unify and potentially update to use URLSearchParams(https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams)

Other information

#10514

[patmmccann]

What do you mean when you say "this would be a good opportunity"? Do you mean the prebid 9 release?

[patmmccann]

This is work is not planned.