[clang] [llvm] Add RunTimeLang to Class and Enumeration DIBuilder functions (PR #72011)

[Augusto Noronha via cfe-commits]

================
@@ -424,6 +424,7 @@ namespace llvm {
     /// \param OffsetInBits Member offset.
     /// \param Flags        Flags to encode member attribute, e.g. private
     /// \param Elements     class members.
+    /// \param RunTimeLang  Optional parameter, Objective-C runtime version.
----------------
augusto2112 wrote:

> I think your entire patch would be a lot simpler if this were the last parameter of the function, as you wouldn't need to change as many callsites and have inline comments explaining the parameter. Did you have a motivation in mind for placing the argument here?

I'm following the pattern on the ordering from the existing functions, for example:
```    
    DICompositeType *createStructType(
        DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber,
        uint64_t SizeInBits, uint32_t AlignInBits, DINode::DIFlags Flags,
        DIType *DerivedFrom, DINodeArray Elements, unsigned RunTimeLang = 0,
        DIType *VTableHolder = nullptr, StringRef UniqueIdentifier = "");

    DICompositeType *createUnionType(DIScope *Scope, StringRef Name,
                                     DIFile *File, unsigned LineNumber,
                                     uint64_t SizeInBits, uint32_t AlignInBits,
                                     DINode::DIFlags Flags,
                                     DINodeArray Elements,
                                     unsigned RunTimeLang = 0,
                                     StringRef UniqueIdentifier = "");
```
        

https://github.com/llvm/llvm-project/pull/72011