Ensure existing usages of InterceptsLocationAttribute are onboarded to the new checksum-based approach

[RikkiGibson]

Prerequisite: #72133

Once we ship the checksum-based interceptors pattern we will want to check in with all the partners who have onboarded to the .NET 8 experimental feature and work with them to get them moved to the new checksum-based approach.

Partner issues:
dotnet/runtime#101079
dotnet/aspnetcore#55152

[RikkiGibson]

Before we remove the path-line-column support, let's report a warning when that attribute signature is used, e.g. late in the .NET 9 cycle. then post-NET 9 we can fully remove.