[ExecuTorch] Add //examples/portable/executor_runner:executor_runner_opt #9287
  Add this suggestion to a batch that can be applied as a single commit.
  This suggestion is invalid because no changes were made to the code.
  Suggestions cannot be applied while the pull request is closed.
  Suggestions cannot be applied while viewing a subset of changes.
  Only one suggestion per line can be applied in a batch.
  Add this suggestion to a batch that can be applied as a single commit.
  Applying suggestions on deleted lines is not supported.
  You must change the existing code in this line in order to create a valid suggestion.
  Outdated suggestions cannot be applied.
  This suggestion has been applied or marked resolved.
  Suggestions cannot be applied from pending reviews.
  Suggestions cannot be applied on multi-line comments.
  Suggestions cannot be applied while the pull request is queued to merge.
  Suggestion cannot be applied right now. Please check back later.
  
    
  
    
Stack from ghstack (oldest at bottom):
Attempt to add a Buck target that's analogous to the CMake build's executor_runner -- has all CPU ops that you need etc. The base executor_runner target is commented as intentionally having minimal deps, hence the separate target.
This is sort of a companion to #9248, except that that PR is for CMake only and this PR is for Buck only.
Differential Revision: D71220489