add system variable tidb_opt_range_max_size (#11239)

[ti-chi-bot]

This is an automated cherry-pick of #11239

What is changed, added or deleted? (Required)

Add system variable tidb_opt_range_max_size.

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• master (the latest development version)
• v6.3 (TiDB 6.3 versions)
• v6.1 (TiDB 6.1 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)

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

• This PR is translated from:
• Other reference link(s): Refine building ranges logic tidb#37176

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• Delete files
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[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• TomShawn

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[TomShawn]

/hold

[qiancai]

这是 6.3 的分支，需要写这个变量吗

[TomShawn]

要改默认值

[TomShawn]

/merge

[ti-chi-bot]

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

Commit hash: 3c3be31