[clang] [clang][bytecode] Only count taken jumps as steps (PR #201845)

[Eli Friedman via cfe-commits]

efriedma-quic wrote:

If the number of steps isn't proportional to the amount of work the compiler is doing, that's a problem: it becomes much easier to hang the compiler.  That said, why are we doing a linear search over case conditions?  It seems like the sort of thing that we could resolve with a better data structure.

https://github.com/llvm/llvm-project/pull/201845