[Feature] Support flow control in zeta

[Hisoka-X]

Purpose of this pull request

1. Add SourceReceivedBytes, SourceReceivedBytesPerSeconds, SinkWriteBytes, SinkWriteBytesPerSeconds as new bytes metrics.
2. Add new config read_limit.rows_per_second and read_limit.bytes_per_second to limit read speed. Only work on Zeta at now.

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/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
• Update the release-note.

[hailin0]

Please add usage documentation

[Hisoka-X]

Please add usage documentation

Done

[ruanwenjun]

Basically LGTM.

[ruanwenjun]

length does not return byte length, it will return the unique code length.
But it seems we don't have a better way to get the byte length.

[hailin0]

+1

[hailin0]

check ci error

check ci error

[Hisoka-X]

check ci error

Fixed.