persisted data breakpoints are not reapplied

[weinand]

Testing #79799

• create a data breakpoint and verify that it works
• stop debug session
• start debug session
• try to hit data breakpoint again

Observe: breakpoint is not hit

When debugging this I noticed that mock-debug's setDataBreakpointsRequest is not called at all.

(And yes, mock-debug by default returns a "canPersist" value of true).

[isidorn]

Assigning to August to investigate furhter.

[isidorn]

@weinand Great catches wrt data breakpoints. Thanks a lot for nicely testing.