Bump to v2.7.4

Drop Pytorch 2.1

Change version to 2.7.3 (#1437)

Signed-off-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>

Bump to v2.7.2

[CI] Use MAX_JOBS=1 with nvcc 12.3, don't need OLD_GENERATOR_PATH

[CI] Don't include <ATen/cuda/CUDAGraphsUtils.cuh>

[CI] Change torch #include to make it work with torch 2.1 Philox

Bump to v2.7.1

[CI] Use torch 2.6.0.dev20241001, reduce torch #include

[CI] Fix CUDA version for torch 2.6