[C++][Parquet] Allowing is_compressed not set if DataPageV2 enabled

[mapleFU]

Describe the enhancement requested

Currently, if data page v2 is enabled, is_compressed is always set if Page has compression, however, this can be eliminated if:

1. Page is empty
2. Compression makes page event larger.

Component(s)

C++, Parquet

[mapleFU]

Issue resolved by pull request 45367
#45367