[ez] Add output_dir field to a couple configs

[ebsmothers]

This field was still missing from a couple configs (I think they were inflight when #2183 landed).

Test plan:

tune run eleuther_eval --config llama3_2/evaluation
...
Running loglikelihood requests:  39%|████████████████████████████████████████████▍                                                                                                      | 2313/5882 [10:34<16:10,  3.68it/s]

[pytorch-bot]

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