[clang] [llvm] Enable ClangIR Build By Default- (PR #221291)

[Ambrose Leeb via cfe-commits]

================
@@ -842,6 +837,11 @@ The `alpha.cplusplus.UseAfterLifetimeEnd` checker was renamed to `alpha.core.Use
 
 #### Improvements
 
+### Clang IR Improvements
+
+- Clang IR has now been enabled in builds by default, and should work with most workloads. However this is still an experimental flag and a work-in-progress.
----------------
Sirraide wrote:

Maybe worth clarifying here that Clang IR codegen is what’s built by default, not that Clang is now _using_ Clang IR for codegen

https://github.com/llvm/llvm-project/pull/221291