[Update] v6.1 removed lower-case-table-name option

[Oreoxmt]

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What is changed, added or deleted? (Required)

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For details, see tips for choosing the affected versions.

• master (the latest development version)
• v6.1 (TiDB 6.1 versions)
• v6.0 (TiDB 6.0 versions)
• v5.4 (TiDB 5.4 versions)
• v5.3 (TiDB 5.3 versions)
• v5.2 (TiDB 5.2 versions)
• v5.1 (TiDB 5.1 versions)
• v5.0 (TiDB 5.0 versions)
• v4.0 (TiDB 4.0 versions)

What is the related PR or file link(s)?

• This PR is translated from: [Update] v6.1 removed lower-case-table-name option docs-cn#9709
• Other reference link(s):

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• 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:

• TomShawn

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[Icemap]

LGTM

[Oreoxmt]

/merge

[ti-chi-bot]

@Oreoxmt: /merge in this pull request requires 1 approval(s).

In response to this:

/merge

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[Oreoxmt]

/merge

[ti-chi-bot]

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

Commit hash: 8d9d08b

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #9413.