Releasing Linux amd64 packages

transform: run OptimizeMaps during package optimizations

This shrinks transform.Optimize() a little bit, working towards the goal
of https://github.com/tinygo-org/tinygo/issues/2870. I ran the smoke
tests and there is no practical downside: one test got smaller (??) and
one had a different .hex hash, but other than that there was no
difference.

This should also make TinyGo a liiitle bit faster but it's probably not
even measurable.