Run Spark SQL tests in CI

[sunchao]

We need some way to run through all Spark SQL tests (i.e., those under spark/sql module), with Comet plugin enabled, for all the Spark branches we support (3.2, 3.3, 3.4 for now). One approach that have been discussed is we clone the the OSS Spark branches or release tags with some .diff files that we maintain in this repo. The downside, of course, is that these .diff files are relatively hard to maintain and could break from time to time when we sync these Spark branches with new commits.