NIFI-9814: Add Range Sampling strategy to SampleRecord

[mattyb149]

Adds range/interval sampling to SampleRecord, to selectively choose which records / ranges are sampled.

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[NissimShiman]

Very nice addition. I tested with various permutations (i.e. including an open start range, an open end range, leaving the value as a blank string and it behaved as designed.

Clean, clear code.

LGTM +1

[NissimShiman]

Just noticed this was still open ...

Follow commit looks good. Nice catch with additional @WriteAttributes of mime.count Verified that it is indeed added on flowfile output and nice cleaning up of customValidate() based on new .dependsOn() for the various PropertyDescriptors

I apologize if this was waiting on comment following up on the latter commit LGTM +1