fix(libs): restore ElvUI-namespaced Ace3 stack clobbered by sweep

The coa-ace3 sweep (commits 0c130e0..5ea6e44, before coa-elvui was added to
EXCLUDED_FORKS in coa-ace3 tools/sweep.py) overwrote ElvUI's customized,
-ElvUI-namespaced Ace3 libs with plain canonical ones. ElvUI registers libs
as AceLocale-3.0-ElvUI and the AceConfig-3.0-ElvUI family (plus -ElvUI
widgets that don't exist in canonical), so the clobber left them
unregistered: ElvUI failed to init (16 locale 'L' errors) and /ec would not
open. Restores ElvUI/Libraries/Ace3/AceLocale-3.0 and the
ElvUI_OptionsUI/Libraries/Ace3 stack to their pre-sweep state (5021fd1).
coa-elvui is now in EXCLUDED_FORKS, so this won't be re-clobbered.

ElvUI_OptionsUI/Libraries/Ace3/AceGUI-3.0/widgets/AceGUIWidget-Label.lua

@@ -2,7 +2,7 @@
 Label Widget
 Displays text and optionally an icon.
 -------------------------------------------------------------------------------]]
-local Type, Version = "Label", 28
+local Type, Version = "Label", 27
 local AceGUI = LibStub and LibStub("AceGUI-3.0", true)
 if not AceGUI or (AceGUI:GetWidgetVersion(Type) or 0) >= Version then return end
 
@@ -12,6 +12,10 @@ local max, select, pairs = math.max, select, pairs
 -- WoW APIs
 local CreateFrame, UIParent = CreateFrame, UIParent
 
+-- Global vars/functions that we don't upvalue since they might get hooked, or upgraded
+-- List them here for Mikk's FindGlobals script
+-- GLOBALS: GameFontHighlightSmall
+
 --[[-----------------------------------------------------------------------------
 Support functions
 -------------------------------------------------------------------------------]]
@@ -125,16 +129,12 @@ local methods = {
 	end,
 
 	["SetFont"] = function(self, font, height, flags)
-		if not self.fontObject then
-			self.fontObject = CreateFont("AceGUI30LabelFont" .. AceGUI:GetNextWidgetNum(Type))
-		end
-		self.fontObject:SetFont(font, height, flags)
-		self:SetFontObject(self.fontObject)
+		self.label:SetFont(font, height, flags)
+		UpdateImageAnchor(self)
 	end,
 
 	["SetFontObject"] = function(self, font)
-		self.label:SetFontObject(font or GameFontHighlightSmall)
-		UpdateImageAnchor(self)
+		self:SetFont((font or GameFontHighlightSmall):GetFont())
 	end,
 
 	["SetImageSize"] = function(self, width, height)