fix(dispels): drop C_Player.IsCustomClass gate from getCoaDispels

Witchdoctor (and likely other CoA classes intermittently) never got the
"On curable debuff" border highlight on raid/party frames: the
C_Player.IsCustomClass() check in getCoaDispels could return false at
scan time and cache playerCoaDispels = false, after which the highlight
manual-scan path was never entered and the fallback RAID filter (which
doesn't know about COA dispel spells) silently returned nothing.

COA_CLASS_DISPELS only contains custom-class tokens (CHRONOMANCER,
WITCHDOCTOR, MONK = Templar, PROPHET = Venomancer, etc.) so any token
match already implies the player is a dispelling custom class — the
IsCustomClass call is redundant. Trust the table directly. Vanilla
classes whose tokens aren't in the table still get false → RAID filter
path, unchanged.

Bump v3.3.0-coa.2.

ShadowedUnitFrames/modules/auras.lua

@@ -26,18 +26,18 @@ local COA_CLASS_DISPELS = {
 }
 local function getCoaDispels()
 	if playerCoaDispels ~= nil then return playerCoaDispels end
-	local cp = _G.C_Player
-	if not cp or not cp.IsCustomClass then
-		-- C_Player not yet initialised (called before PLAYER_LOGIN); don't
-		-- cache — retry on the next scan so we pick it up once in-world.
+	-- Trust the COA_CLASS_DISPELS table directly: it only contains custom-class
+	-- tokens, so any token-match implies the player IS a dispelling custom
+	-- class. Avoids C_Player.IsCustomClass timing/availability issues (the
+	-- API isn't reliable for every class on every login — Witchdoctor in
+	-- particular was getting cached as false on raid frames).
+	local _, token = UnitClass("player")
+	if not token or token == "" then
+		-- UnitClass not ready yet (very early init); don't cache — retry on
+		-- the next scan so we pick it up once in-world.
 		return nil
 	end
-	if cp:IsCustomClass() then
-		local _, token = UnitClass("player")
-		playerCoaDispels = token and COA_CLASS_DISPELS[token] or false
-	else
-		playerCoaDispels = false
-	end
+	playerCoaDispels = COA_CLASS_DISPELS[token] or false
 	return playerCoaDispels
 end
 -- Expose for other modules (highlight.lua) so the dispel set stays single-source.