docs: Add infoschema changes to Placement Rules in SQL#28892

Merged

ti-chi-bot merged 5 commits intopingcap:masterfrom morgo:update-design-doc

Oct 25, 2021

+41-18

Commits on Oct 16, 2021

Add infoschema changes
morgo
committed

Commits on Oct 17, 2021

update placement syntax
morgo
committed

Commits on Oct 25, 2021