Test: breakpoint hit count

[isidorn]

Test for #12374 and #12373:

Complexity: 2

• any OS - @bpasero
• any OS - @egamma

We now support specifying a hit count for a breakpoint - thus a breakpoint will only be hit if a debug-adapter specific hit count condition is met. More details: #12373

Have a node workspace and verify:

• You can edit an existing or new breakpoint to specify the hit condition
• You can add an existing or new conditional breakpoint to specify the hit condition
• Breakpoint with a hit count is only hit if the 'hit count expression' is met. The syntax for node-debug is:
  (>|>=|=|<|<=|%)?\s*([0-9]+)

Examples:

• >10break after 10 hits
• <3 break on the first two hits
• 10 same as >= 10
• % 2 break on every other hit