2) Added new struct and class specifiers to account for settings being extracted from the engine code.
3) UHT no longer depends on pre-existing classes in the engine but will use them when it needs to create the engine instances of the classes.
#rb joe.kirchoff, janathan.adamczewski
#rnx
#preflight 620fa0316c6c638c07ddca93
[CL 19049306 by Tim Smith in ue5-main branch]
* Added a sorted specifier list to reduce string compares when evaluating metadata tags
* Use move semantices where possible
* Use RemoveSwap instead of Remove when processing show/hide metadata tags. Generated code can change as a result of hide/show tag order changing.
#jira
#rnx
#ROBOMERGE-SOURCE: CL 10872240 via CL 10872241 via CL 10872242
#ROBOMERGE-BOT: (v620-10870533)
[CL 10872243 by marc audy in Main branch]
