KServe CPU Nightly Test

[agunapal]

Description

This PR introduces CI for TorchServe-kfs nightly images

• Tests V1 and V2 Inference protocol
• Works with Mnist
• CPU only

Fixes #(issue)

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Feature/Issue validation/testing

Passing run

Checklist:

• Did you have fun?
• Have you added tests that prove your fix is effective or that this feature works?
• Has code been commented, particularly in hard-to-understand areas?
• Have you made corresponding changes to the documentation?

[codecov]

Codecov Report

Merging #2734 (0b211fe) into master (45d1bed) will not change coverage.
The diff coverage is n/a.

❗ Current head 0b211fe differs from pull request most recent head 1639a50. Consider uploading reports for the commit 1639a50 to get more accurate results

@@           Coverage Diff           @@
##           master    #2734   +/-   ##
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  Coverage   72.44%   72.44%           
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  Files          85       85           
  Lines        3963     3963           
  Branches       58       58           
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  Hits         2871     2871           
  Misses       1088     1088           
  Partials        4        4           

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