Convert to OleDb assembly and last Cryptography DllImport to GeneratedDllImport

[AaronRobinsonMSFT]

/cc @jkoritzinsky @elinor-fung

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Issue Details

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/cc @jkoritzinsky @elinor-fung

Author:	AaronRobinsonMSFT
Assignees:	-
Labels:	area-System.Data.OleDB
Milestone:	7.0.0

[jkoritzinsky]

While you're here, can you update the OleDb P/Invokes to match the interop guidelines for the repo? (putting them in the Interop/Windows folder, etc?)

[AaronRobinsonMSFT]

While you're here, can you update the OleDb P/Invokes to match the interop guidelines for the repo? (putting them in the Interop/Windows folder, etc?)

I don't think I can do that in this review to be honest. The signatures don't all match and uses of those types aren't the same in all places. This would mean I'd need to update many other projects. I'm not sure how we should be doing this since the model in place now means we need to trace through all projects and permit generation which makes many of these changes very hard to reason about.