Revert "mounter(ticdc): fix mounter add default value type unsupported (

pingcap#3846) (pingcap#3855)" (pingcap#3921)

processor,sink(cdc): let sink report resolved ts and do not skip buff…

…er sink flush (pingcap#3540)

schema storage shallow copy DBInfo (pingcap#3085)

* schema storage shallow copy DBInfo

Signed-off-by: sdojjy <[email protected]>

* schema storage shallow copy DBInfo

fix ErrSnapshotLostByGC message (pingcap#3083) (pingcap#3090)

fix ErrSnapshotLostByGC message (pingcap#3083) (pingcap#3090)

ddl-puller: use standard context and pass changefeed, table info (pin…

…gcap#3020) (pingcap#3045)

metrics: add data flow metrics (pingcap#2763) (pingcap#2831)

metrics: add data flow metrics (pingcap#2763) (pingcap#2831)

server: when init data dir, skip if get changefeed info failed. (ping…

…cap#2778) (pingcap#2787)

* This is an automated cherry-pick of pingcap#2778

Signed-off-by: ti-chi-bot <[email protected]>

* fix conflicts

Signed-off-by: Neil Shen <[email protected]>

Co-authored-by: Ling Jin <[email protected]>
Co-authored-by: Neil Shen <[email protected]>

sink: fix codec json encoding with non binary string (pingcap#2764)