enable ci to verify go.mod

[Congrool]

What type of PR is this?

/kind enhancement

What this PR does / why we need it:

Currently, we have no way to check if go.mod in a pr has been tidied.
We should do that to make sure all pr has run go mod tidy before being merged.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

other Note

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In response to this:

What type of PR is this?

/kind enhancement

What this PR does / why we need it:

Currently, we have no way to check if go.mod in a pr has been tidied.
We should do that to make sure all pr has run go mod tidy before being merged.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

other Note

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[codecov]

Codecov Report

Merging #94 (8e8ad2d) into master (23956e8) will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master     #94   +/-   ##
======================================
  Coverage    9.34%   9.34%           
======================================
  Files          18      18           
  Lines        2258    2258           
======================================
  Hits          211     211           
  Misses       2010    2010           
  Partials       37      37           

Flag	Coverage Δ
unittests	9.34% <ø> (ø)

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[rambohe-ch]

@Congrool It's a good idea to check go mod for pull request, maybe we can also add this feature for other repos.

[rambohe-ch]

/lgtm
/approve

[openyurt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Congrool, rambohe-ch

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The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [rambohe-ch]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[openyurt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Congrool, rambohe-ch

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [rambohe-ch]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[Congrool]

@Congrool It's a good idea to check go mod for pull request, maybe we can also add this feature for other repos.

Sure, I'll add it to openyurt repo as well.