feat(NODE-4808)!: remove support for stream() transform on cursors and change streams

[baileympearson]

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Cursor and ChangeStream stream() method no longer accepts a transform

Cursors and ChangeStreams no longer accept a transform function. ReadableStream.map() can be used instead:

// before
const stream = cursor.stream({ transform: JSON.stringify });

// after
const stream = cursor.stream().map(JSON.stringify);

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