[infra] Add specs for most ci,try builders

These files were generated using:
https://fuchsia.googlesource.com/tools/+/refs/heads/sandbox/kjharland/fuchsia-proto-migration/cmd/generate_spec_files/

(some files failed because there's not been a green build or there was some other error.
I'll need to manually add those).

This change MUST be submitted after http://fxr/277564.

Bug: IN-1102 #comment
Change-Id: I0a2f6dab69222c81e2b8a9a74b3c08cb28ac175a