Reduce test duplication in tests for data page stattistics #11000

Follow on to #10982

@tshauck noted there is non trivial repetition in some tests

@tmi says:

@tshauck this is one of the things that were bugging me a bit, the other one being https://github.com/apache/datafusion/pull/10982/files#diff-7110f4709c105a18ef74a212396444d62052179a735d148fb62470a8b157fb40R749-R763 -- both are very repetitive

however, I didn't want to get overeager, only to realize later than the abstractions chosen was not the right one. Perhaps the best way forward would be to address #10952 first (which may also have its own "float16"-like tricky case), and then getting the correct macros for testing, index handling, etc. Speaking of that, would you like to take that one? I'd be happy to review then

Originally posted by @tmi in #10982 (comment)