[lldb] Make Target::CleanupProcess consistent for breakpoints and watchpoints

[tatyana-krasnukha]

Summary

Target clears watchpoints hit count but doesn't do the same for breakpoints. As was discussed in D84527, this behavior should be unified.

Now responsibility for cleanup lies on *List symmetrically for breakpoints and watchpoints.

The test case verifies that hit counts are reset to 0 after killing the process.

[tatyana-krasnukha]

TestAddressBreakpoints.py fails on the last check - it expects hit count to be saved after re-launching the process. Removed that check.