Clean up doc comments for APIs so documentation page looks right

[twsouthwick]

This issue is to track updates we should do to the doc comments so that results look like

• Part types should not list the types they're mapping, but rather have that as part of the doc for the member itself. For example see https://review.learn.microsoft.com/en-us/dotnet/api/documentformat.openxml.packaging.imageparttype?view=openxml-3.0.1&branch=smoke-test
• PresetTextWrap should be PresetTextWarp in https://learn.microsoft.com/en-us/dotnet/api/documentformat.openxml.drawing.presettextwrap?view=openxml-2.8.1

[AlfredHellstern]

for #2: link to corrected topic is https://learn.microsoft.com/en-us/dotnet/api/documentformat.openxml.drawing.presettextwarp?view=openxml-3.0.1&viewFallbackFrom=openxml-2.8.1