Re-land [lldb-dap] Add support for data breakpoint. (#81909)

This implements functionality to handle DataBreakpointInfo request and
SetDataBreakpoints request.

Previous commit
https://github.com/llvm/llvm-project/commit/8c56e78ec531f0e2460213c20fff869b6b7add99
was reverted because setting 1 byte watchpoint failed in the new test on
ARM64. So, I changed the test to setting 4 byte watchpoint instead, and
hope this won't break it again. It also adds the fixes from
https://github.com/llvm/llvm-project/pull/81680.