ARROW-10999: [Rust] [Benchmarks] Use signed ints for TPC-H schema
ARROW-10999: [Rust] [Benchmarks] Use signed ints for TPC-H schema

The TPC-H parquet files generated by the benchmark crate could not be read by Apache Spark because they used unsigned ints, which Spark does not support (JVM only has signed ints).

I would  like to use the same data sets for benchmarking DataFusion, Apache Spark, and other tools, so have changed the schema to use signed ints.

Closes #8980 from andygrove/tpch-signed-ints

Authored-by: Andy Grove <f68909d51919859739a1c5d24450a2cc1026e93b@gmail.com>
Signed-off-by: Jorge C. Leitao <dfffc62510208f06492f17a48dc6ce87aa15abf6@gmail.com>

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