add release note for v7.5.1

[Oreoxmt]

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What is changed, added or deleted? (Required)

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For details, see tips for choosing the affected versions.

• master (the latest development version)
• v8.0 (TiDB 8.0 versions)
• v7.6 (TiDB 7.6 versions)
• v7.5 (TiDB 7.5 versions)
• v7.4 (TiDB 7.4 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)
• 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 release note for v7.5.1 docs-cn#16660
• 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]

[LGTM Timeline notifier]

Timeline:

• 2024-02-27 08:02:18.887858934 +0000 UTC m=+949027.635482037: ☑️ agreed by hfxsd.
• 2024-02-28 07:31:32.036252961 +0000 UTC m=+1033580.783876072: ☑️ agreed by qiancai.

[Oreoxmt]

/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.6: #16633.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #16634.