[llvm] [MLGO] Fix logging verbosity in scripts (PR #107818)

[Mircea Trofin via llvm-commits]

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@@ -35,11 +36,21 @@ def parse_args_and_run():
     parser.add_argument(
         "--root_dir", type=str, help="The root dir of module paths to combine."
     )
+    parser.add_argument(
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mtrofin wrote:

can you add an issue and reference it here and below to factor in a common place stuff like this? otherwise LGTM.

https://github.com/llvm/llvm-project/pull/107818