useBaseGvlid added to aliasBidder

[mkomorski]

🏷 Type of documentation

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

📋 Checklist

• [x] Related pull requests in prebid.js or server are linked -> Paste link in this list or reference it on the PR itself
• [ ] For new adapters check submitting your adapter docs https://github.com/prebid/Prebid.js/pull/12247

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