add content for clinic us server

[Oreoxmt]

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What is changed, added or deleted? (Required)

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

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For details, see tips for choosing the affected versions.

• master (the latest development version)
• 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: add content for clinic us server docs-cn#10362
• 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]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• shichun-0415

To complete the pull request process, please ask the reviewers in the list to review by filling /cc @reviewer in the comment.
After your PR has acquired the required number of LGTMs, you can assign this pull request to the committer in the list by filling /assign @committer in the comment to help you merge this pull request.

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[shichun-0415]

Rest LGTM

[shichun-0415]

Suggested change

	Go to the [Clinic Server in the US](https://clinic.pingcap.com) and select **Sign in with TiDB Account** to enter the TiDB Cloud login page. If you do not have an TiDB Cloud account, create one on that page.
	Go to the [Clinic Server in the US](https://clinic.pingcap.com) and select **Sign in with TiDB Account** to enter the TiDB Cloud login page. If you do not have a TiDB Cloud account, create one on that page.

[Oreoxmt]

/remove-label LGT1
/status LGT2

[ti-chi-bot]

@Oreoxmt: The label(s) lgt1 cannot be applied. These labels are supported: Hacktoberfest, contribution, first-time-contributor, requires-followup, good-first-issue, hacktoberfest-accepted, help-wanted, needs-cherry-pick-release-2.1, needs-cherry-pick-release-3.0, needs-cherry-pick-release-3.1, needs-cherry-pick-release-4.0, needs-cherry-pick-release-5.0, needs-cherry-pick-release-5.1, needs-cherry-pick-release-5.2, needs-cherry-pick-release-5.3, needs-cherry-pick-release-5.4, needs-cherry-pick-release-6.0, needs-cherry-pick-release-6.1, needs-cherry-pick-master, question, require-LGT1, require-LGT2, require-LGT3, special-week, v4.0, v5.0, v5.1, v5.2, v5.3, v5.4, v6.0, v6.1, v6.2, for-future-release, requires-version-specific-changes, website.

In response to this:

/remove-label LGT1
/status LGT2

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[Oreoxmt]

/merge

[ti-chi-bot]

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

Commit hash: e7622a3

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #9577.

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #9578.