[CircleCI] Disable pytorch_linux_xenial_cuda10_2 test jobs (#65071)

[CircleCI] Disable pytorch_linux_xenial_cuda10_2 test jobs (#65071)

Summary:
As all of them has been migrated to GHA:
- pytorch_linux_pytorch_linux_xenial_cuda10_2_cudnn7_py3_gcc7_distributed_test -> "linux-xenial-cuda11.3-py3.6-gcc7 / test (distributed, 1, 1, linux.8xlarge.nvidia.gpu)"
- pytorch_linux_xenial_cuda10_2_cudnn7_py3_gcc7_test1 -> "linux-xenial-cuda10.2-py3.6-gcc7 / test (default, 1, 2,
linux.8xlarge.nvidia.gpu)"
- pytorch_linux_xenial_cuda10_2_cudnn7_py3_gcc7_test2 -> "linux-xenial-cuda10.2-py3.6-gcc7 / test (default, 2, 2,
linux.8xlarge.nvidia.gpu)"
- pytorch_linux_xenial_cuda10_2_cudnn7_py3_multigpu_test -> "linux-xenial-cuda10.2-py3.6-gcc7 / test (multigpu, 1, 1,
linux.16xlarge.nvidia.gpu)"
- pytorch_linux_xenial_cuda10_2_cudnn7_py3_nogpu_NO_AVX2_test -> "linux-xenial-cuda10.2-py3.6-gcc7 / test (nogpu_NO_AVX2, 1, 1, linux.2xlarge)"
- pytorch_linux_xenial_cuda10_2_cudnn7_py3_nogpu_NO_AVX_test -> "linux-xenial-cuda10.2-py3.6-gcc7 / test (nogpu_NO_AVX, 1, 1, linux.2xlarge)"
- pytorch_linux_xenial_cuda10_2_cudnn7_py3_slow_test -> "linux-xenial-cuda10.2-py3.6-gcc7 / test (slow, 1, 1, linux.8xlarge.nvidia.gpu)"

"pytorch_linux_xenial_cuda10_2_cudnn7_py3_gcc7_build" is still a holdout due to slow gradchecks

Pull Request resolved: https://github.com/pytorch/pytorch/pull/65071

Reviewed By: driazati, seemethere, janeyx99

Differential Revision: D30963413

Pulled By: malfet

fbshipit-source-id: d9a5188ce7eb2f60547b91b854a5db83af2b10e7