Add `BytesInput.fromInts(int[] integers)`

### Describe the enhancement requested

A `BytesInput.fromInts(int[] integers)` method would be a convenient addition for writing tests. How about implementing such a method?
e.g.
`BytesInput repetitionLevels = BytesInput.fromInts(new int[]{1, 2, 3});`

### Component(s)
parquet-common

Start with the BytesInput entry point in the parquet-common component and inspect its existing factory methods. Add the requested fromInts(int[] integers) API so the example can construct a BytesInput from integer values, then verify the relevant parquet-common tests or add coverage for the example input.

Written by the indexing model from the issue text.