Rename SummaryTree to distinguish it from ISummaryTree

[agarwal-navin]

These should be renamed as per #4403 (comment)

[curtisman]

Related #4683

[ghost]

This issue has been automatically marked as stale because it has had no activity for 180 days. It will be closed if no further activity occurs within 8 days of this comment. Thank you for your contributions to Fluid Framework!

[arinwt]

I feel like SummaryTree is really just Summary. That's the possible returned summary type (either handle or tree).

From the comment, it could look something like this:

old name	old tree only	new name	new tree only
SummaryTree	ISummaryTree	Summary	ISummaryTree
ISummarizeResult	ISummaryTreeWithStats	ISummaryWithStats	ISummaryTreeWithStats
IContextSummarizeResult	IChannelSummarizeResult	ISummaryWithGcData	ISummaryTreeWithGcData
ISummarizeInternalResult	none	ISummarizeInternalResult	none

[agarwal-navin]

that sounds good. summarize will stop returning GC data so the third row won't be needed anymore.

[ghost]

This issue has been automatically marked as stale because it has had no activity for 180 days. It will be closed if no further activity occurs within 8 days of this comment. Thank you for your contributions to Fluid Framework!

[ghost]

This issue has been automatically marked as stale because it has had no activity for 180 days. It will be closed if no further activity occurs within 8 days of this comment. Thank you for your contributions to Fluid Framework!