[clang] [llvm] [clang][python][test] Move python binding tests to lit framework (PR #145855)

[Rainer Orth via llvm-commits]

rorth wrote:

I'd already acknowledged the failure and provided a possible 1-line patch (which I cannot test).  Instead of doing that, you chose to revert.

I'm totally tired of that constant merge/revert/reland/revert/... churn that is so typical of LLVM.  I can fully understand reversal if a patch breaks builds or causes failures on many bots.  A single `XPASS` on a single bot doesn't seem so critical to me, especially if there's already a suggestion for a fix.

This has already taken way too long; I've no more time of energy for this: consider this patch dropped.

https://github.com/llvm/llvm-project/pull/145855