feat: Support mode flag by `verbatimSymlinks` polyfill

[tetsuharuohzeki]

Is there an existing issue for this?

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Current Behavior

Node.js v17.6.0 (also v16.15.0) add the support verbatimSymlinks option to fsPromises.cp().

But the current polyfill for cp() implementation has not supported it yet. https://github.com/npm/fs/blob/b78893107ae447c4ac65182aef24d9f39a46cd45/lib/cp/index.js#L11

Expected Behavior

cp() polyfill should support verbatimSymlinks option

Steps To Reproduce

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Environment

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