Test: Breakpoint icons in debug viewlet

[isidorn]

Refs: #3388

• any os: @chrmarti
• any os: @joaomoreno

Complexity: 2

This milestone we have added breakpoint icons in the debug viewlet breakpoints view. This icon should always be the same as the one in the editor glyph margin. Verify for both light and dark theme:

• Disabled breakpoints show up gray with a hover explaining they are disabled
• Unverified breakpoints show up with an empty gray circle
• Regular breakpoints show up with a red circle
• Conditional breakpoints show up with a red circle and an equality sign. On hover the condition is shown
• Hit cound breakpoints show as conditional breakpoints
• Function breakpoints appear with a red triangle

Please note: be aware of the limitations of function breakpoints: https://code.visualstudio.com/docs/nodejs/nodejs-debugging#_function-breakpoints