kv (ticdc): remove unused code, simplified some names and added comme…

…nts to improved the clarity of the code (pingcap#10917)

ref pingcap#10879

sink(ticdc): Revert changes related to the conflict detector (pingcap…

…#10923)

close pingcap#10341

*(ticdc): Revert pr 10780 for release-6.5 (pingcap#10882)

ref pingcap#10341

ticdc: fix ddl `exchange partition xxxx with validation` to deal with…

… `with validation` correctly (pingcap#10867)

close pingcap#10859

mounter(ticdc): default value convert to the correct data type (pingc…

…ap#10804) (pingcap#10826)

close pingcap#10803

codec(ticdc): avro encode DDL event (pingcap#10736)

ref pingcap#8869

dm: fix update dml loss if binary column is primary key (pingcap#10685)…

… (pingcap#10699)

close pingcap#10672

binlog-filter: log error instead of return it (pingcap#10380) (pingca…

…p#10385)

close pingcap#10282

kv (ticdc): fix kvClient reconnection downhill loop (pingcap#10559) (p…

…ingcap#10570) (pingcap#10599)

puller(ticdc): fix resolvedTs get stuck when region split and merge (…

…hotfix) (pingcap#10558)

ref pingcap#10157