Drop spark-3.1.x support for spark-rapids

[NvTimLiu]

CI part for the issue: https://github.com/NVIDIA/spark-rapids/issues/10955

We'll drop spark-3.1.x support from branch-24.08, change the default spark version string to 3.2.0

This change needs to work together with the source code update for dropping spark-3.1.x support

Will keep monitoring CI jobs status after all the related changes get merged

[NvTimLiu]

Draft the PR, because this change needs to work together with the source code update for dropping spark-3.1.x support

[NvTimLiu]

build

[pxLi]

can you also help remove 31x https://github.com/NVIDIA/spark-rapids/blob/branch-24.08/pom.xml#L866 from the test list? thanks

[NvTimLiu]

Drop this, replaced by https://github.com/NVIDIA/spark-rapids/pull/11159