[lldb] Re-enable TestExprsChar on arm64

This test passes on arm64 (Apple Silicon). I assume that "aarch64" still
ensures this gets skipped on Linux. I don't have access to such and
environment so I'll have to rely on the bot complaining.

GitOrigin-RevId: 28c6b1e5522f2beeac48ccf359e423cb31160c8d
1 file changed