Add golden files for TPC-H/TPC-DS suites

[sunchao]

We currently have a bunch of TPC-H/TPC-DS test suites including CometTPCDSQuerySuite, CometPlanStabilitySuite, etc. In order to use these, we need to add the golden files generated via Comet first.

[viirya]

This is blocked by #8

[sunchao]

Hmm, I thought we just need to generate the files locally?

[viirya]

I thought you want run these test suite, e.g., CometTPCDSQuerySuite, CometPlanStabilitySuite, on CI?

[viirya]

Without the CI pipeline, it seems no much sense to include these golden files.

[sunchao]

Right, in that sense it is more related to #7. #8 is to run SQL tests in Spark itself.