*: upgrade tidb_auto_analyze_partition_batch_size default value

[hawkingrei]

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• This PR is translated from: *: upgrade tidb_auto_analyze_partition_batch_size default value docs-cn#19405

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[Oreoxmt]

Suggested change

	- Default value: `8192`. Before v7.6.0, the default value is `1`. Before v8.2.0, the default value is `1024`.
	- Range: `[1, 8192]`, Before v8.2.0, the max value is `1024`.
	- Default value: `8192`. Before v7.6.0, the default value is `1`. Starting from v8.2.0, the default value is changed from `1024` to `8192`.
	- Range: `[1, 8192]`. Before v8.2.0, the value range is `[1, 1024]`.