lightning: reuse worker-concurr and remove range-concurr in local backend

[D3Hunter]

What problem does this PR solve?

Issue Number: ref #42930

Problem Summary:

What is changed and how it works?

• reuse worker-concurr and remove range-concurr, it's not that needed to introduce another xxx-concurr into local backend

Check List

Tests
existing test should be enough

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
  • run locally and make sure we're using worker-concurr to generate job
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• gozssky
• lance6716

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[D3Hunter]

/run-integration-br-test

[D3Hunter]

ci pass
https://ci.pingcap.net/blue/organizations/jenkins/tidb_ghpr_integration_br_test/detail/tidb_ghpr_integration_br_test/12549/pipeline

[D3Hunter]

@lance6716 @GMHDBJD

[D3Hunter]

@lance6716

[lance6716]

/merge

[ti-chi-bot]

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

Commit hash: c4cc7d2