[WIP]: add v8.5.0 release notes

[qiancai]

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What is changed, added or deleted? (Required)

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

Tips for choosing the affected version(s):

By default, CHOOSE MASTER ONLY so your changes will be applied to the next TiDB major or minor releases. If your PR involves a product feature behavior change or a compatibility change, CHOOSE THE AFFECTED RELEASE BRANCH(ES) AND MASTER.

For details, see tips for choosing the affected versions.

• master (the latest development version)
• v8.4 (TiDB 8.4 versions)
• v8.3 (TiDB 8.3 versions)
• v8.2 (TiDB 8.2 versions)
• v8.1 (TiDB 8.1 versions)
• v7.5 (TiDB 7.5 versions)
• v7.1 (TiDB 7.1 versions)
• v6.5 (TiDB 6.5 versions)
• v6.1 (TiDB 6.1 versions)
• v5.4 (TiDB 5.4 versions)
• v5.3 (TiDB 5.3 versions)

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

• This PR is translated from: [WIP]: add v8.5.0 release notes docs#19336
• Other reference link(s):

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]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[YangKeao]

LGTM

[ti-chi-bot]

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In response to this:

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[D3Hunter]

Suggested change

	* 建库，建表加速功能成为正式功能（GA），大大节省了数据迁移，集群初始化的时间 [#50052](https://github.com/pingcap/tidb/issues/50052) @[D3Hunter](https://github.com/D3Hunter) @[gmhdbjd](https://github.com/gmhdbjd) tw@Oreoxmt <!--1977-->
	* 建表加速功能成为正式功能（GA），大大节省了数据迁移，集群初始化的时间 [#50052](https://github.com/pingcap/tidb/issues/50052) @[D3Hunter](https://github.com/D3Hunter) @[gmhdbjd](https://github.com/gmhdbjd) tw@Oreoxmt <!--1977-->