ASP.NETCore contains System.Security.Cryptography.Pkcs but does not expose for reference

[ericstj]

See https://github.com/dotnet/sdk/pull/51343/files/18e7355363b7ecb77ad81f9ff515cb7d6113de7e#r2446270194

PKCS is a dependency of Cryptography.Xml, which is exposed.

We'd like to prune Cryptography.Xml, but doing so will also prune PKCS.

Packages which are part of the shared framework should include and expose their entire closure.

[MihuBot]

I'm a bot. Here are possible related and/or duplicate issues (I may be wrong):

• Upgrading from 5.0 to 6.0 yields InvalidOperationException: Cannot find compilation library location for package 'System.Security.Cryptography.Pkcs #38892
• runtime cannot find System.Security.Cryptography.Pkcs  #38227