ticdc: add binary_encoding_method to openapi v2 (#14596)

[ti-chi-bot]

This is an automated cherry-pick of #14596

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

• This PR is translated from: ticdc: add binary_encoding_method to openapi v2 docs-cn#14877
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• Delete files
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• Need modification after applied to another branch
• Might cause conflicts after applied to another branch

[qiancai]

/approve

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