Implement validations for darts suggestion service

[tenzen-y]

What this PR does / why we need it: I implemented validations for the darts suggestion service. Also, I commonized a function to validate NAS operations as pkg/suggestion/v1beta1/nas/common/validate.py.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged): Part-of #1126

Checklist:

• [ ] Docs included if any changes are user facing

[coveralls]

Coverage decreased (-0.09%) to 72.857% when pulling d338dd292d982e38ba333f0239d6f3b7c802d9bb on tenzen-y:implement-darts-validation-algorithm into 478e01d612c0d1c05c7fceea29edbea922b30b9e on kubeflow:master.

[tenzen-y]

@anencore94 Could you sign CLA with [email protected]?

https://github.com/kubeflow/katib/pull/1926/checks?check_run_id=7882927727

[anencore94]

@anencore94 Could you sign CLA with [email protected]?

https://github.com/kubeflow/katib/pull/1926/checks?check_run_id=7882927727

Thaks, I was signed in with different email, but now I signed with both email :)

[anencore94]

Looks good ! /lgtm

[tenzen-y]

/hold until corrections are complete.

[tenzen-y]

Please take another look since I addressed all your review comments. @anencore94

/hold cancel

[johnugeorge]

Thanks @tenzen-y

/approve

[google-oss-prow[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: anencore94, johnugeorge, tenzen-y

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