rebase release-2.0 to release-2.0-binlog (pingcap#8928)

CHANGELOG: add changelog for v2.0.11 (pingcap#8925)

binlog: use pumps client to write binlog (pingcap#7659) (pingcap#8078) (

pingcap#8822)

CHANGELOG: add changelog for v2.1.2 (pingcap#8767)

CHANGELOG: add release note for v2.0.10 (pingcap#8721)

doc: add the change log for release 2.1.1 (pingcap#8666)

CHANGELOG: add changelog for 2.1.0-ga (pingcap#8526)

CHANGELOG: Add changelog for 2.0.9 (pingcap#8354)

add changelog for v2.1.0-rc.5 (pingcap#8272) (pingcap#8275)

support pumps client for binlog