[llvm] [mlir] [CMake][TableGen] Make TableGen CMake functions compatible with CMP0116 (PR #72333)

[NAKAMURA Takumi via llvm-commits]

================
@@ -19,19 +19,34 @@ function(tablegen project ofn)
 
   # Use depfile instead of globbing arbitrary *.td(s) for Ninja.
   if(CMAKE_GENERATOR MATCHES "Ninja")
----------------
chapuni wrote:

```
if(CMAKE_GENERATOR MATCHES "Ninja" AND cmp0116_state STREQUAL "NEW")
```

I think it would be fair to fall back to `file(GLOB)` if `CMP0116` is `OLD`.

https://github.com/llvm/llvm-project/pull/72333