Revert "[lldb][debugserver] Fix an off-by-one error in watchpoint identification (#134314)"
This reverts commit 21d912121c9f41385b165a736be787527f5bd7c2.
Failure on the aarch64 ubuntu bot when setting the 4th watchpoint;
may be a hardware limitation on that bot. I thought creating four
watchpoints would be generally safe, but I don't need to do that
for my test, will re-land without it.