Hit Count Breakpoint support with LLDB

[AlexandraKemperMS]

Making a separate issue for Hit count breakpoints not working in LLDB as mentioned here.

This feature is supported in VS Code but not the extension, so the hit count breakpoint is available to a user, but does not work. In the example below, the breakpoint is just ignored by the debugger. This is using clang++ on a physical mac machine debugging with LLDB (without cppdbg) and using cpptools version 1.22.11. The code creates a few basic vectors and arrays.

We need to disable/grey out hit count breakpoints in the UI until a time when we support them.