Add onefuzz-file-format

[ranweiler]

Part of #2699.

[codecov-commenter]

Codecov Report

Merging #2706 (14f6f9a) into main (349604f) will decrease coverage by 3.24%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2706      +/-   ##
==========================================
- Coverage   28.64%   25.39%   -3.25%     
==========================================
  Files         308      123     -185     
  Lines       37662    12889   -24773     
==========================================
- Hits        10787     3273    -7514     
+ Misses      26875     9616   -17259     

Impacted Files	Coverage Δ
src/agent/onefuzz/src/env.rs
src/agent/coverage-legacy/src/code.rs
src/agent/onefuzz-task/src/local/cmd.rs
src/agent/coverage-legacy/src/cache.rs
...rc/agent/input-tester/src/test_result/fast_fail.rs
src/agent/onefuzz-agent/src/coordinator.rs
.../agent/onefuzz-task/src/tasks/regression/common.rs
src/agent/onefuzz/src/asan.rs
src/agent/reqwest-retry/src/lib.rs
src/agent/debugger/src/debug_event.rs
... and 175 more

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