[Feature][Connector-V2][Lemlist]Add Lemlist source connector

[TaoZex]

Purpose of this pull request

1.Create a common authentication method for SaaS,ther authentication methods will continue to be added later.

2.Add Lemlist source connector

config :

Without using fields:

using fields:

Check list

• Code changed are covered with tests, or it does not need tests for reason:
• If any new Jar binary package adding in your PR, please add License Notice according
  New License Guide
• If necessary, please update the documentation to describe the new feature. https://github.com/apache/incubator-seatunnel/tree/dev/docs
• If you are contributing the connector code, please check that the following files are updated:
  1. Update change log that in connector document. For more details you can refer to connector-v2
  2. Update plugin-mapping.properties and add new connector information in it
  3. Update the pom file of seatunnel-dist

[hailin0]

Thanks, can you help add the e2e test

reference
#3340

[ashulin]

You need to add Lemlist source to plugin-mapping.properties

[TaoZex]

You need to add Lemlist source to plugin-mapping.properties

Thank you so much for your help.

[EricJoy2048]

Please add e2e test reference #3340

[TaoZex]

Please add e2e test reference #3340

Thanks. I have added e2e test.

[TaoZex]

Thanks, can you help add the e2e test

reference #3340

Thanks. I have added e2e test.PTAL.