ci/docker: use NCCL 2.26.2-1 (#149778)

Related to #149153

This updates some build scripts to hopefully fix the nightly builds which are somehow building against nccl 2.25.1 and using 2.26.2 from pip.

Test plan:

After merging rerun nightly linux jobs and validate that nccl version matches
Pull Request resolved: https://github.com/pytorch/pytorch/pull/149778
Approved by: https://github.com/Skylion007, https://github.com/atalman

Co-authored-by: Andrey Talman <atalman@fb.com>
(cherry picked from commit ddc0fe903f3043246103d71b60a4fff0aeeef9e8)

Co-authored-by: Tristan Rice <rice@fn.lc>