[ReadHandler] ReadHandler makes ICD wake up twice for reports

[lpbeliveau-silabs]

The current ReadHandler logic makes devices wake up on min interval just to clear the WaitingForMinInterval flag regardless of if a report should be scheduled or not on that timeout.

The logic needs to be changed to prevent un-necessary wake-ups in ICD.

[lpbeliveau-silabs]

To accomplish this, the timing logic will be extracted from the ReadHandlers and moved into a separate object : ReportScheduler.

[lpbeliveau-silabs]

See #27553