Fix InvalidOperationException in pagination when services return relative nextLink URIs#56249

JoshLove-msft merged 3 commits intotypespec/update-http-client-1.0.0-alpha.20260212.5Azure/azure-sdk-for-net:typespec/update-http-client-1.0.0-alpha.20260212.5from

copilot/sub-pr-56248Azure/azure-sdk-for-net:copilot/sub-pr-56248Copy head branch name to clipboard