add oncall annotation for TARGETS files in fbcode based on contbuild information - /data/users/bayarmunkh/target_oncalls_26 (#1417)

Summary:
Pull Request resolved: https://github.com/pytorch/executorch/pull/1417

This diff adds oncall to Buck TARGETS files in fbcode repository based on their contbuild information.

This diff was generated by this command:
    ./fbcode/ownership/coverage/submit_diff_with_file_oncall_mapping.sh /data/users/bayarmunkh/target_oncalls_26

see more context here: https://fb.workplace.com/groups/fbcode/posts/6551897871513663 and https://fb.workplace.com/groups/fbcode.devx/permalink/3149549092006627/

drop_conflicts

Differential Revision: D52150100

fbshipit-source-id: a941dff1c83c986b02de73a1d3e1672f4242f51e