Fix hf-bert-mrpc-func tests failure (#710)
Fix hf-bert-mrpc-func tests failure (#710)

* Add evaluation step in command
* Test in v2-8, v3-8, and v4-8
 * flax-latest-hf-bert-mrpc-func-v2-8-1vm-v5v2g
 * flax-latest-hf-bert-mrpc-func-v3-8-1vm-vj6zj
 * flax-latest-hf-bert-mrpc-func-v4-8-1vm-z5ppw
GoogleCloudPlatform/ml-testing-accelerators,GoogleCloudPlatform/ml-testing-accelerators