Add `torch >=1.12` requirement for `Tapas`
# What does this PR do?

Tapas files are changed in #20149 to use torch's `scatter`. The torch tensor's method `scatter_reduce` accept the argument `src` only for torch >= 1.12.

This PR add some warnings/requirements in tapas modeling/test files to avoid test failures in past CI with torch <= 1.11.

(one previous similar PR is #19851)
_The documentation is not available anymore as the PR was closed or merged._