Storage Provider creates informative names for deal data staged via the FileStore

[frrist]

Background

This issue is motivated by filecoin-project/lotus#5291. Users have requested that the temporary files created by the FileStore have a more informative name when they are staged before being passed off to the Storage Miner Module.

Where to Begin

go-fil-markets/storagemarket/impl/provider.go

Lines 294 to 301 in 46f73ec

	tempfi, err := p.fs.CreateTemp()
	if err != nil {
	return xerrors.Errorf("failed to create temp file for data import: %w", err)
	}
	cleanup := func() {
	_ = tempfi.Close()
	_ = p.fs.Delete(tempfi.Path())
	}