Add go mod vendor check in CI

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 34.04%. Comparing base (3a12ba2) to head (8f1a123).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #306 +/- ## ======================================= Coverage 34.04% 34.04% ======================================= Files 47 47 Lines 3836 3836 ======================================= Hits 1306 1306 Misses 2444 2444 Partials 86 86 ``` | [Flag](https://app.codecov.io/gh/netobserv/netobserv-ebpf-agent/pull/306/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=netobserv) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/netobserv/netobserv-ebpf-agent/pull/306/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=netobserv) | `34.04% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=netobserv#carryforward-flags-in-the-pull-request-comment) to find out more.

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[jotak]

/approve

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jotak

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