vm: rename vm.Module to vm.SourceTextModule

At the last TC39 meeting, a new type of Module Records backed by
JavaScript source called Dynamic Module Records was discussed, and
it is now at Stage 1. Regardless of whether that proposal makes it
all the way into the spec, SourceTextModule is indeed a more
descriptive and accurate name for what this class represents.

PR-URL: https://github.com/nodejs/node/pull/22007


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Jan Krems <jan.krems@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Yuta Hiroto <hello@hiroppy.me>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: John-David Dalton <john.david.dalton@gmail.com>
Reviewed-By: Bradley Farias <bradley.meck@gmail.com>