Blue: Add placementId bidder param

[samuelfabel]

This pull request refers to add a new parameter placementId at the bidder-params of Blue bidder.

🏷 Type of documentation

• new bid adapter
• update bid adapter
• new feature
• text edit only (wording, typos)
• bugfix (code examples)
• new examples

📋 Checklist

• Related pull requests in prebid.js or server are linked Blue: Add placementId bidder param prebid.github.io#5724
• For new adapters check submitting your adapter docs

[bsardo]

Please open up a docs PR and leave the link on this PR.

[samuelfabel]

done

[bsardo]

I don't see a adapters/blue/params_test.go file. Please add it to ensure your bidder params rules defined in your static/bidder-params/blue.json file are working properly. I suggest copying it from another adapter as a starting point.

[samuelfabel]

done

[github-actions]

Code coverage summary

Note:

• Prebid team doesn't anticipate tests covering code paths that might result in marshal and unmarshal errors
• Coverage summary encompasses all commits leading up to the latest one, 0d9fd7f

blue

Refer here for heat map coverage report

github.com/prebid/prebid-server/v3/adapters/blue/blue.go:20:	Builder		100.0%
github.com/prebid/prebid-server/v3/adapters/blue/blue.go:28:	MakeRequests	85.7%
github.com/prebid/prebid-server/v3/adapters/blue/blue.go:49:	MakeBids	100.0%
total:								(statements)	95.8%

[github-actions]

Code coverage summary

Note:

• Prebid team doesn't anticipate tests covering code paths that might result in marshal and unmarshal errors
• Coverage summary encompasses all commits leading up to the latest one, d32141c

blue

Refer here for heat map coverage report

github.com/prebid/prebid-server/v3/adapters/blue/blue.go:20:	Builder		100.0%
github.com/prebid/prebid-server/v3/adapters/blue/blue.go:28:	MakeRequests	85.7%
github.com/prebid/prebid-server/v3/adapters/blue/blue.go:49:	MakeBids	100.0%
total:								(statements)	95.8%