[llvm] [orc-rt] Move the regression tests into test/regression (PR #208391)

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``````````diff
--- lit.cfg.py	2026-07-09 07:53:25.000000 +0000
+++ lit.cfg.py	2026-07-09 07:59:44.186326 +0000
@@ -10,15 +10,14 @@
 
 config.name = "ORC-RT"
 config.test_format = lit.formats.ShTest()
 config.test_source_root = os.path.dirname(__file__)
 config.test_exec_root = os.path.join(config.orc_rt_obj_root, "test", "regression")
-config.suffixes = [
-    ".test"
-]
+config.suffixes = [".test"]
 
 llvm_config.with_environment(
     "PATH",
     os.path.join(config.orc_rt_obj_root, "tools", "orc-executor"),
-    append_path=True)
+    append_path=True,
+)
 
 llvm_config.use_default_substitutions()

``````````

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https://github.com/llvm/llvm-project/pull/208391