Update Identity dependencies

[halter73]

The changes in #51430 never made it to the main branch, so this is taking the important bit so people running the .NET 9 preview templates don't see the issuer error fixed by AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet#2361

@jennyf19 I decided to update to the latest versions available currently on NuGet, but this is a one-off PR. Should be automated? If so, how frequently?

[wtgodbe]

We'll need to update source-build-externals in order to take this change without breaking source-build. @dotnet/dnceng @dotnet/source-build-internal is there a doc on how to do that?

[MichaelSimons]

We'll need to update source-build-externals in order to take this change without breaking source-build. @dotnet/dnceng @dotnet/source-build-internal is there a doc on how to do that?

https://github.com/dotnet/source-build-externals?tab=readme-ov-file#updating-an-external-component-to-a-newer-version

The part that is not mentioned is that usually there would need to be coordination to get the source-build-externals PR and the consuming product repo to flow in together.

[halter73]

I'll let the bot handle the IdentityModelVersion update since it seems to be taking care of that recently with dotnet/source-build-externals#252 and #53302. I only updated that since #51430 had and I figured why not.

We should only need to update the 2.13.4 versions to 2.15.2 or later to pick up the fix in AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet#2361 which was my motivation for opening this PR.