router(dm): migrate router from dm to tidb-tools (pingcap#4911)

close pingcap#4701

validator(dm): full mode validator, part 1 (pingcap#4539)

ref pingcap#4488

status(dm): fix update mariadb source status (pingcap#3648) (pingcap#…

…4735)

test(cdc): Add defaultvalue integration test (pingcap#4224)

close pingcap#4223

test(ticdc): use mysql 2022 rpm GPG key (pingcap#4434) (pingcap#4436)

close pingcap#4433

ddl(dm): make skipped ddl pass `SplitDDL()` (pingcap#4176)

close pingcap#4173

ticdc/cli: use cdc OpenAPI instead of etcd for some cli commands (Par…

…t Ⅱ) (pingcap#3931)

codec(cdc): fix encoder `max-message-bytes` (pingcap#4074) (pingcap#4077

)

codec(cdc): fix encoder `max-message-bytes` (pingcap#4074) (pingcap#4076

)

* This is an automated cherry-pick of pingcap#4074

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

* remove craft.

* fix json.

* fix more.

* fix mq test.

* fix json test.

* fix mq test.

* fix kafka test.

* fix json test.

* fix kafka test

* fix kafka test

* fix kafka test

* comment out.

* revert comment.

* update go sum.

* move opt out.

Co-authored-by: Ling Jin <[email protected]>
Co-authored-by: 3AceShowHand <[email protected]>

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

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