[Feature](Streaming Job) Extend streaming job to support MySQL synchronization

[JNSimba]

What problem does this PR solve?

Issue Number: close #58896

Related PR: #xxx

Problem Summary:

Release note

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Check List (For Author)

• Test

  • Regression test
  • Unit Test
  • Manual test (add detailed scripts or steps below)
  • No need to test or manual test. Explain why:
    • This is a refactor/code format and no logic has been changed.
    • Previous test can cover this change.
    • No code files have been changed.
    • Other reason

• Behavior changed:

  • No.
  • Yes.

• Does this need documentation?

  • No.
  • Yes.

Check List (For Reviewer who merge this PR)

• Confirm the release note
• Confirm test cases
• Confirm document
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[Thearas]

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[Copilot]

Pull request overview

This PR extends streaming jobs to support MySQL synchronization via CDC (Change Data Capture), enabling users to sync data from MySQL databases to Doris in real-time. The implementation includes a new CDC client service and modifications to the streaming job framework.

Key Changes:

• Introduces a CDC client Spring Boot application that interfaces with MySQL using Flink CDC connectors
• Adds support for FROM MySQL TO Database syntax in job creation
• Implements split-based data reading for both snapshot and binlog phases
• Adds RPC endpoints for BE-FE communication to handle CDC operations

Reviewed changes

Copilot reviewed 85 out of 85 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
regression-test/suites/job_p0/streaming_job/cdc/test_streaming_mysql_job.groovy	Regression test for MySQL streaming job with CDC
gensrc/proto/internal_service.proto	Adds RPC interface for CDC client communication
fs_brokers/cdc_client/**	Complete CDC client implementation using Spring Boot
fe/fe-core/.../streaming/**	Extends streaming job framework with multi-table task support
fe/fe-core/.../offset/jdbc/**	JDBC offset provider for tracking MySQL binlog positions
fe/fe-core/.../util/StreamingJobUtils.java	Utility functions for streaming job management
docker/thirdparties/docker-compose/mysql/my.cnf	Enables MySQL binlog for CDC

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