Bug: $insertDataTransferForRichText doesn't use selection parameter

[SamVgaard]

The changes from Pull Request #5954 to $insertDataTransferForRichText now result in the selection parameter not being utilized for 'text/plain' dataTranfers.

Lexical version: 0.16.0

Steps To Reproduce

1. Call $insertDataTransferForRichText(dataTransfer, selection, editor) where the dataTransfer is of type 'text/plain' and selection is some RangeSelection but not the current selection, i.e. not selection !== $getSelection()

The current behavior

$insertDataTransferForRichText inserts text from the dataTransfer parameter to the current selection ($getSelection())

The expected behavior

$insertDataTransferForRichText should insert text from the dataTransfer parameter to the selection parameter as per the function description

/**
 * @param dataTransfer an object conforming to the [DataTransfer interface] (https://html.spec.whatwg.org/multipage/dnd.html#the-datatransfer-interface)
 * @param selection the selection to use as the insertion point for the content in the DataTransfer object
 * @param editor the LexicalEditor the content is being inserted into.
 */

For context, I was using this function for a "replace all" function for a find and replace tool. Naturally I don't want to set the current selection to each selection to be replaced; I just want to iteratively create range selections to replace with rich text.