[llvm] [lit] add --max-retries-per-test execution option (PR #141851)

[Thomas Preud'homme via llvm-commits]

================
@@ -0,0 +1,23 @@
+# ALLOW_RETRIES: 3
+# RUN: "%python" "%s" "%counter"
----------------
RoboTux wrote:

Same as above, %counter does not seem to be used by the testcase. Also is it possible to share the same test.py accross the tests?

https://github.com/llvm/llvm-project/pull/141851