fuzz with SQLancer

See https://github.com/datafusion-contrib/datafusion-distributed/pull/222

We can generate SQL queries using SQLancer https://github.com/datafusion-contrib/datafusion-sqlancer and verify the queries run correctly in distributed datafusion (see property-based validators added in https://github.com/datafusion-contrib/datafusion-distributed/pull/231)

There's some work to do

• Add arrow flight server for SQLancer to run on
  • Intercept CREATE TABLE and INSERT statements and modify them so we write data to testdata/sqlancer/data
  • Intercept SELECT statements and write them to testdata/sqlancer/queries. Note that queries still need to be executed so SQLancer can use the data to generate more queries (ex. queries on the information scheam table for sure - unclear if it uses normal SELECT queries)
  • Data + queries = fuzz input. We run this input against distributed datafusion and validate using property based tests
• The instructions for sqlancer say to run it with java. We probably need to compile and save a linux sqlancer binary in this repo or in git lfs.

Note that sqlancer does not support nested queries and window functions at the time of writing.

Start by reviewing PRs 222 and 231, then inspect the SQLancer project and its Java execution instructions. Define the Arrow Flight server flow around CREATE TABLE, INSERT, and SELECT statements, using testdata/sqlancer/data and testdata/sqlancer/queries as the fuzz input. Done means SQLancer input can run against distributed DataFusion and be checked by the property-based validators, with a documented Linux SQLancer binary approach.