[feature] support two phase commit

[gnehil]

Proposed changes

Spark doris connector support two-phase commit.

Set the option doris.sink.enable-2pc to true to enable two-phase commit for stream load.

After enabled, the behavior is as follows:
Pre-submit stream load requests for each batch load, and then

1. When the job succeeds, all pre-committed transactions will be committed.
2. When the job fails, all pre-committed transactions will be aborted.

Checklist(Required)

1. Does it affect the original behavior: (Yes/No/I Don't know)
2. Has unit tests been added: (Yes/No/No Need)
3. Has document been added or modified: (Yes/No/No Need)
4. Does it need to update dependencies: (Yes/No)
5. Are there any changes that cannot be rolled back: (Yes/No)

Further comments

If this is a relatively large or complex change, kick off the discussion at dev@doris.apache.org by explaining why you chose the solution you did and what alternatives you considered, etc...

[JNSimba]

good job

[JNSimba]

LGTM