12753 [web] Don’t require felt to be in PATH (cla: yes, platform-web)

12754 Fix Metal builds by accounting for the updated SubmitFrame signature. (cla: yes)

12761 Build AOT and test targets, generate FARs when building Fuchsia (CQ+1, cla: yes)

12771 roll buildroot to 01e923507b28e5d1d3fe7597d2db2b30b0a543e9 (CQ+1, cla: yes)

12773 Revert “Manage resource and onscreen contexts using separate IOSGLCon… (cla: yes)

12775 Added some thread asserts to the code and made ios_surface_ safe since (cla: yes)

12777 Fix Metal builds. (cla: yes)