Add documents to PDB for types that have no methods with IL

[davidwengier]

Part of #55834

First two commits are from Samuel, subsequent is my cleanup/changes, but easiest to just look at the entire changeset as one.

[davidwengier]

Tips for solving, or investigating, determinism and rebuild issues are readily accepted. Or even just a DLL diff tool :)

[AlekseyTs]

Tips for solving, or investigating, determinism and rebuild issues are readily accepted. Or even just a DLL diff tool :)

I added two comments to give you an idea what to look for. Basically, we need to make sure that from build to build the same information is emitted in the same order and using the same values (ids, etc.).

[tmat]

🕐

[davidwengier]

Basically, we need to make sure that from build to build the same information is emitted in the same order

Thank you very much, I think that's solved it. I probably should have realised too, as I had sorted the results in the test validate method too 🤦‍♂️

[davidwengier]

The rebuild tests don't like using the mapped document name. I'm guessing, based on the failures, that the custom debug info isn't being serialized and needs to be? I guess I need to add that? Not really sure how it all works.

@RikkiGibson do you have any insight here?

[tmat]

🕐

[tmat]

[davidwengier]

@cston if you can have another look at this today, I'd really appreciate it, so we can get it in before the snap at 4pm.