Report errors when hardware breakpoints fail with LLDB

[xusheng6]

Summary

• Warn users upfront in the hardware breakpoint dialog when adding a hardware execution breakpoint with LLDB before debugging (it would previously be silently recorded but fail later)
• Log errors via LogError when deferred hardware breakpoints fail to apply on first stop in the LLDB adapter
• Log errors in DebuggerBreakpoints::Apply() when hardware breakpoints fail to apply
• Improve error messages in the dialog: LLDB-specific message links to Hardware execution breakpoint does not work on Linux x86/x64 with LLDB adapter #957, generic message lists possible causes

Test plan

• With LLDB adapter selected, try adding a hardware execution breakpoint before debugging starts — should show warning dialog
• With LLDB adapter, add a hardware execution breakpoint during debugging — should show improved error message with link to Hardware execution breakpoint does not work on Linux x86/x64 with LLDB adapter #957
• With other adapters, hardware breakpoint failures should show improved generic error message
• Check log output for LogError messages when hardware breakpoints fail to apply

Closes #1034

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