Fix documentation of /DEBUG:FASTLINK and plain /DEBUG.

[davidmatson]

From discussion with the product team, /DEBUG means the same thing as /DEBUG:FULL. This has been the case for the linker itself since at least VS 2013 and is currently the case with all templates. Remove statements that indicated /DEBUG sometimes meant /DEBUG:FASTLINK.

Also, recommend not using /DEBUG:FASTLINK, per the product team.

[prmerger-automator]

@davidmatson : Thanks for your contribution! The author(s) have been notified to review your proposed change.

[learn-build-service-prod]

Learn Build status updates of commit 27fc9f5:

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[Jak-MS]

@TylerMSFT

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#label:"aq-pr-triaged"
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[TylerMSFT]

Could you update the date metadata at the top of the file?
This is a meaningful change so we should update the date to reflect that it's the latest info.
This is a welcome update - thank you.

[davidmatson]

I assume that's just the ms.date? If so, done. (If not, please let me know the right way.)

[learn-build-service-prod]

Learn Build status updates of commit c24954f:

✅ Validation status: passed

File	Status	Preview URL	Details
docs/build/reference/debug-generate-debug-info.md	✅Succeeded

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[TylerMSFT]

Perfecto. Thank you, @davidmatson
#sign-off