[LibraryImportGenerator] Update diagnostic titles to use localized strings

[elinor-fung]

The analyzer diagnostics were using localized strings for the message and description, but not the title.

Also collapses a few of the more specific IDs into existing ones.

[ghost]

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Issue Details

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The analyzer diagnostics were using localized strings for the message and description, but not the title.

Also collapses a few of the more specific IDs into existing ones.

Author:	elinor-fung
Assignees:	-
Labels:	area-System.Runtime.InteropServices
Milestone:	7.0.0

[AaronRobinsonMSFT]

Look at someone updating all the xlf files :-P

Do we need to update the shipped diagnostics in the txt file? I thought they were the numbered values.

[elinor-fung]

Are you talking about the list-of-diagnostics file? We will. We still need to switch these all to use the SYSLIB prefix (planning on doing that after this change) and will update that file at the same time.

[danmoseley]

Just curious do we consistently use Marshaller spelling? As opposed to Marshaler.

[elinor-fung]

As of two-ish years ago, yes. Our new APIs / code should be consistently using the double l. We settled on: marshal, marshalling, marshalled, marshaller. We've also been working with docs style guide owners to try to get an entry added.

[elinor-fung]

Failure is #66571