Add configurable torch-latest dependency versions (#8016)
## Summary
The modal test now shows the error because of the combination of PyTorch
v2.7 and Transformer `main` branch, and it is blocking PRs. To address
it, we improve our test workflows as follows.
- Add manual dependency version inputs for the torch-latest CI workflows
and default the torch-latest family to PyTorch 2.10 plus Transformers
git `main`.
- Let CPU and AWS full torch-latest runs select either released
Transformers package versions or an explicit Transformers git ref for
manual validation.
- Let Modal torch-latest runs select supported PyTorch/CUDA image
presets and an optional Transformers git ref, defaulting to
`2.10.0-cuda12.8` and Transformers git `main`.
## Known follow-up
- The AWS full real CI lane for PyTorch 2.10 plus Transformers main
reached `Unit tests (parallel)` but failed with 33 failures. Some of
these may overlap with fixes in #8015; I am opening this PR now so the
workflow/input changes can be reviewed while those failures are handled
separately.
- CPU and Modal real CI validation for the requested tuple passed.
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Signed-off-by: Masahiro Tanaka <mtanaka@anyscale.com>
