Increase docker build timeout (#85156)
Docker builds used to take around 15 mins to run (more than the 10 min timeout) and have recently started taking even longer due to conda's slow dependency resolver.
We were in this bad state where we _depended_ on the retry to complete the build. That is, the first attempt would try to build docker, timeout, then the second attempt would continue to build on top of the cache the first build had setup, etc.
Increasing the timeout so that docker builds actually have enough time to complete the build within a single attempt
Pull Request resolved: https://github.com/pytorch/pytorch/pull/85156
Approved by: https://github.com/huydhn
