[docs] Update stale `new` and `preview` tags in v8 docs#15547

Merged

JCQuintas merged 3 commits intomui:masterfrom JCQuintas:update-v8-docs

Nov 25, 2024

+4-10

Commits on Nov 21, 2024

update flairs for treeview and charts
JCQuintas
committed

Commits on Nov 22, 2024

update tree view and datetime picker
JCQuintas
committed

Commits on Nov 25, 2024

remove newFeature flags from some data grid pages
cherniavskii
committed