config(ticdc): Fix old value configuration check for maxwell protocol (#3747)

[ti-chi-bot]

This is an automated cherry-pick of #3747 and #3983

What problem does this PR solve?

close https://github.com/pingcap/ticdc/issues/3676

What is changed and how it works?

• add validate funcs
• complete protocol when create changefeed
• add tests

Check List

Tests

• Unit test

• Manual test(https://github.com/pingcap/ticdc/pull/3747#issuecomment-986629511)
  Code changes

• Has exported function/method change

• Has exported variable/fields change

Side effects

None

Related changes

• Need to cherry-pick to the release branch

Release note

Fix the problem that old value is not forced on automatically in `canal-json` and `maxwell` protocols

[ti-chi-bot]

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[codecov-commenter]

Codecov Report

Merging #3779 (63fe120) into release-4.0 (753073a) will increase coverage by 3.3954%.
The diff coverage is 67.1043%.

@@                 Coverage Diff                 @@
##           release-4.0      #3779        +/-   ##
===================================================
+ Coverage      53.7661%   57.1615%   +3.3954%     
===================================================
  Files              153        170        +17     
  Lines            15958      19849      +3891     
===================================================
+ Hits              8580      11346      +2766     
- Misses            6475       7440       +965     
- Partials           903       1063       +160     

[Rustin170506]

Manual testing:

1. start tidb cluster
2. start cdc server
3. add new changefeed config file

enable-old-value=false

[sink]

protocol = "maxwell"

4. run: ./cdc cli changefeed create --pd http://127.0.0.1:2379 --sink-uri kafka://127.0.0.1:9092/ticdc-test --config=changefeed.toml
5. output:

➜  bin git:(master) ✗ ./cdc cli changefeed create --pd http://127.0.0.1:2379 --sink-uri "kafka://127.0.0.1:61536/ticdc-test" --config=changefeed.toml
[2021/12/24 15:02:51.728 +08:00] [WARN] [client_changefeed.go:314] ["Attempting to replicate without old value enabled. CDC will enable old value and continue."] [protocol=maxwell]

canal-json:

[2021/12/24 15:04:40.200 +08:00] [WARN] [client_changefeed.go:314] ["Attempting to replicate without old value enabled. CDC will enable old value and continue."] [protocol=canal-json]

[Rustin170506]

/run-all-tests

[Rustin170506]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 63fe120