[WIP] Vectorized Reads using Arrow

[prodeezy]

Just a WIP POC right now so is not expected to be merged. This is just for comments.

Things I intend to add:

• a separate module iceberg-arrow that will house the code for reading parquet into Arrow
  Iceberg's Reader needs to choose Row-wise or Vectorized reading based on config.
  issue#311
• batch sizing as config issue#312

Update: #319 is the new PR

[danielcweeks]

Hey @prodeezy, thanks for updating and creating the pull request. Looks like the build is breaking and while we don't need exhaustive reviews, it would be nice to keep the branch in a buildable state. I pulled it down and it looks like the dependency locks are preventing. Could you just add the updated version locks to pull in arrow (i.e. gradlew --write-locks)?

There are a number of checkstyle violations, but I think we can look past those for now (unless you want to tackle them with the version locks).

[prodeezy]

will do. i have a different branch "vectorized-read" in my local repo with latest code from master merged in. will update locks and fix checkstyle errors and create another pr. closing this for now. sorry bout the confusion.

[prodeezy]

raised #319 as a replacement with the updated version locks and checkstyle errors fixed.