[clang] [lldb] [clang][AST] fix ast-print of extern <lang> with >=2 declarators, fixed, fixed (PR #98795)

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temyurchenko wrote:

@AaronBallman could you please review? 

I've fixed at least the LLDB tests. There was an actual bug in function parameters construction that was revealed by the invariant check. 

However, I can't run the whole LLDB suite. Even among the reported failing tests, some are «unsupported» on my machine. Even without my changes, a lot of LLDB tests are unsupported or failing, I guess some were killed by oom-killer.
On the first attempt, @gulfemsavrun suggested to run the LLDB test suite on this PR. I would be glad, if that offer is still on.

Regarding the orc-rt test failures: I tried building one of the failing objects and I can't reproduce the failure. Perhaps, because the tests are run on Windows? It would be very helpful if @Prabhuk could run the failing command on a debug build.

https://github.com/llvm/llvm-project/pull/98795