Port PR from PBS-Go: New Adapter: fwssp

[cross-repo-issue-creation]

A PR was merged over on PBS-Go

• New Adapter: fwssp prebid-server#4309
• timestamp: 2025-06-05T03:54:28Z

[AntoxaAntoxic]

@Net-burst This one is identical to the FreewheelSSP bidder: the same maintainer email, the same vendor id, the same bidder code. Only the scheme is different. So I suggest making it an alias of FreewheelSSP bidder.