Fixes & Minor refactor of validation/autoupdate to support native node classes properly post composition/preset support changes
#rb phil.popp
[FYI] sondra.moyls
#preflight 611162780182eb0001daa982
#ROBOMERGE-SOURCE: CL 17106014 via CL 17106199
#ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v854-17104634)
[CL 17106241 by rob gay in ue5-release-engine-test branch]
- Make MetaSoundEdGraph transient (never serialized)
- Move FText::FromString calls to concrete FText definitions to avoid warnings while packaging
#rb phil.popp
#jira UE-114986
#preflight 609979f75b1a0b0001529285
[CL 16255509 by Rob Gay in ue5-main branch]