Consolidate benchmarking options/ENV settings #21936

• part of [EPIC] Add SQL based benchmarking #21706

as mentioned several places on

• Add SQL based benchmarking harness, port tpch to use framework #21707

There are several command line flags / environment variables that are duplicated in the benchmark runner (and @Omega359 just followed the same pattern with the new runner)

It would be great to consolidate all the options, and for any that have existing environment settings from SessionConfig, instead use session config

It feels like we maybe could just reuse https://docs.rs/datafusion/latest/datafusion/prelude/struct.SessionConfig.html#method.from_env rather than implementing special cases for many of these options

Originally posted by @alamb in #21707 (comment)