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

[Konrad Kleine via llvm-commits]

kwk wrote:

> Can you please also document the option in https://github.com/llvm/llvm-project/blob/main/llvm/docs/CommandGuide/lit.rst?

Done in 009ce5e312b8

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