[clang] [ItaniumMangle] Use mangleType instead of mangleNameOrStandardSubstitution in mangleCXXCtorVTable function (PR #109970)

[Younan Zhang via cfe-commits]

================
@@ -11,6 +11,7 @@ struct Y { };
 //CHECK: @pr5966_i = external global
 //CHECK: @_ZL8pr5966_j = internal global
 
+
----------------
zyn0217 wrote:

nit: revert the blank line

https://github.com/llvm/llvm-project/pull/109970