Feat/metric validation

[ujjawal-khare-27]

Related issue number

Closes #40586

Checks

• [ ] I've signed off every commit(by using the -s flag, i.e., git commit -s) in this PR.
• [x] I've run scripts/format.sh to lint the changes in this PR.
• [ ] I've included any doc changes needed for https://docs.ray.io/en/master/.
  • [ ] I've added any new APIs to the API Reference. For example, if I added a method in Tune, I've added it in doc/source/tune/api/ under the corresponding .rst file.
• [ ] I've made sure the tests are passing. Note that there might be a few flaky tests, see the recent failures at https://flakey-tests.ray.io/
• Testing Strategy
  • [x] Unit tests
  • [ ] Release tests
  • [ ] This PR is not tested :(

[rkooo567]

cc @alexeykudinkin can you take a look?

[rkooo567]

lint failure seems related

[rkooo567]

can you fix lint failure?

[ujjawal-khare]

can you fix lint failure?

Will do

[anyscalesam]

@rkooo567 can you merge since you approved?

[ujjawal-khare-27]

@jjyao can you please help here, I am not sure why these tests are failing.

[anyscalesam]

@ujjawal-khare-27 can you rebase and address the comments from @jjyao above?