Test: column breakpoints

[isidorn]

• win @chrmarti
• os x @rebornix
• linux @aeschli

Complexity: 4
Refs: #14784

We now support setting breakpoints on a column. In order for column breakpoints to be respected the debug adapter extension has to support them - at the moment node debugger is supporting column breakpoints.
Have a worskpace that you can debug and verify:

• You can add column breakpoints via comand palette and via context menu during a debug session
• Breakpoint location is updated by the debug adapter if needed
• Execution is stopped on the column breakpoint
• Column breakpoints are nicely decorated in the editor
• Disable some column breakpoints and add some conditions to column brekapoints - make sure this is nicely decorated in the editor and respected by the execution