Applies optional filtering to the BP context menu and related UIs.
Primarily this is implemented at the BlueprintActionDatabase/Registrar level as permissions are mostly static. One additional filter has been added to BlueprintActionFilter to handle filtering out items from assets that cannot be referenced from *this* blueprint.
Added type filtering to the variable type tree to prevent creating disallowed variable types. This piggybacks on the already-existing FImportedPinTypeSelectorFilter.
Also added some auditing console commands: bp.AuditThreadSafeFunctions and bp.AuditFunctionCallsForBlueprint
Corrected FBlueprintEditorUtils::HasFunctionBlueprintThreadSafeMetaData to not track FUNC_BlueprintEvent flags for native functions.
#jira UE-156715
#rb Phillip.Kavan,Jason.Stasik
#preflight 62b9bedae77151e5996dd658
#ROBOMERGE-OWNER: thomas.sarkanen
#ROBOMERGE-AUTHOR: thomas.sarkanen
#ROBOMERGE-SOURCE: CL 20890474 via CL 20891658 via CL 20892543 via CL 20892549
#ROBOMERGE-BOT: UE5 (Release-Engine-Staging -> Main) (v971-20777995)
[CL 20896198 by thomas sarkanen in ue5-main branch]
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