Dynamic type support for ParquetDenseVectorDocumentGenerator

[b8zhong]

To solve issue #2662

Not done (nor do I have tests yet!). But let me know what you think of this @lintool

[lintool]

No, I don't think you're doing it at the best place... I was thinking in ParquetDenseVectorCollection somewhere here:
https://github.com/castorini/anserini/blob/master/src/main/java/io/anserini/collection/ParquetDenseVectorCollection.java#L166

i.e., at the point you're reading in the data from the file.

[b8zhong]

Ohh - got it that makes sense. Will update

[lintool]

We have a test failure here?

We currently have src/test/resources/sample_docs/parquet/msmarco-passage-bge-base-en-v1.5.parquet - what about a test cases where we have a variant of the parquet file stored as floats, and we make sure both work?

[vincent-4]

Updated the test format to use the same structure as previously– (in the two files below)
With new entries in:

src/test/java/io/anserini/index/IndexFlatDenseVectorsTest.java
src/test/java/io/anserini/index/IndexHnswDenseVectorsTest.java

And added a new, converted parquet file (floats) in the path (used by the new tests): src/test/resources/sample_docs/parquet/msmarco-passage-bge-base-en-v1.5.parquet-float/test1.parquet