[pytorch][CI] add e2e mobile custom build jobs to CI (#34184)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/34184
Add mobile custom build with static dispatch & dynamic dispatch to CI.
Most of mobile code analysis CI should be covered by the custom build +
dynamic dispatch flow, so changing it to running on master only.
Test Plan: Imported from OSS
Differential Revision: D20241774
Pulled By: ljk53
fbshipit-source-id: f34c5748735c536ab6b42c8eb1429d8bbdaefd62
