[SPARK-37974][SQL] Implement vectorized DELTA_BYTE_ARRAY and DELTA_LENGTH_BYTE_ARRAY encodings for Parquet V2 support#35262
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What changes were proposed in this pull request?
This PR provides a vectorized implementation of the DELTA_BYTE_ARRAY encoding of Parquet V2. The PR also implements the DELTA_LENGTH_BYTE_ARRAY encoding which is needed by the former.
Why are the changes needed?
The current support for Parquet V2 in the vectorized reader uses a non-vectorized version of the above encoding and needs to be vectorized.
Does this PR introduce any user-facing change?
No
How was this patch tested?
Reproduces all the tests for the encodings from the Parquet implementation. Also adds more cases to the Parquet Encoding test suite.