add recovery guide for two dc deployment

[Oreoxmt]

First-time contributors' checklist

• [ ] I've signed Contributor License Agreement that's required for repo owners to accept my contribution.

What is changed, added or deleted? (Required)

• add two missing command line flags --force-new-cluster and --version in PD
• remove the config wait-sync-timeout = "1m" according to https://github.com/pingcap/docs-cn/pull/10754
• Add recovery guide for two dc deployment

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.

• [x] master (the latest development version)
• [x] v6.2 (TiDB 6.2 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: https://github.com/pingcap/docs-cn/pull/8669 https://github.com/pingcap/docs-cn/pull/10754
• 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]

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[Oreoxmt]

/verify

[Oreoxmt]

@nolouch @disksing PTAL

[ti-chi-bot]

@Oreoxmt: PR needs rebase.

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[ti-chi-bot[bot]]

@Oreoxmt: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-verify	8d2b228417aa986f55ffd37b65d22b09fc7e1aa1	link	true	/test pull-verify

Full PR test history. Your PR dashboard.

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