Queue::write_buffer_with() needs a more appropriate name

[kpreid]

When originally envisioned, write_buffer_with() took a closure. It no longer does, and so the “with” part of the name no longer means anything. “With what?” It should be given a more meaningful name.

I don't have any really good ideas for what it should be called, though.

If it weren’t for the WebGPU specification defining writeBuffer(), and the churn, we could imagine renaming write_buffer_with() to write_buffer(), and rename the current write_buffer() (that copies from a provided slice) to copy_to_buffer().

write_buffer_mapping()?