lightning: introduce a new parameter header-schema-match for CSV

[dsdashun]

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What is changed, added or deleted? (Required)

Modify the doc to introduce a new parameter for Lightning CSV configuration. According to this issue: pingcap/tidb#40839

Which TiDB version(s) do your changes apply to? (Required)

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• master (the latest development version)
• v6.6 (TiDB 6.6 versions)
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• v6.4 (TiDB 6.4 versions)
• v6.1 (TiDB 6.1 versions)
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What is the related PR or file link(s)?

• This PR is translated from:
• Other reference link(s): lightning: introduce param to skip CSV header parsing tidb#41128

Do your changes match any of the following descriptions?

• Delete files
• Change aliases
• Need modification after applied to another branch
• Might cause conflicts after applied to another branch

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• qiancai

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[TomShawn]

/cc @Frank945946

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[TomShawn]

/status LGT1

[qiancai]

LGTM

[hfxsd]

/merge

[ti-chi-bot]

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

Details

Commit hash: 3c4bdf1