[Mlir-commits] [mlir] [mlir][python] allow passing in PYTHONPATH to lit tests (PR #89296)

[Maksim Levental]

================
@@ -204,6 +204,7 @@ def add_runtime(name):
 # binaries come from the build tree. This should be unified to the build tree
 # by copying/linking sources to build.
 if config.enable_bindings_python:
+    config.environment["PYTHONPATH"] = os.getenv("PYTHONPATH", "")
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makslevental wrote:

```suggestion
    config.environment["PYTHONPATH"] = os.getenv("MLIR_LIT_PYTHONPATH", "")
```

https://github.com/llvm/llvm-project/pull/89296