refactor: cherry pick #12524 and #12840 to v1.3-rc#12888

Merged

stdrc merged 2 commits intov1.3-rcfrom rc/cp-12524-12840-to-v1.3

Oct 17, 2023

+428-371

Commits on Oct 16, 2023

refactor(optimizer): change stream key to option (#12524 )

st1page
authored and
stdrc
committed
fix(stream topn): fix pk indices of TopN and GroupTopN (#12840 )
stdrc
committed