CI:Updating golang version to 1.18

[varshab1210]

What type of PR is this?

Uncomment only one /kind line, and delete the rest. For example, > /kind bug would simply become: /kind bug

/kind bug /kind cleanup /kind failing-test /kind enhancement /kind documentation /kind code-refactoring

What does this PR do / why we need it:

Have you updated the necessary documentation?

• [ ] Documentation update is required by this PR.
• [ ] Documentation has been updated.

Which issue(s) this PR fixes:

Fixes #?

How to test changes / Special notes to the reviewer:

[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (91b47ef) 58.58% compared to head (5ac5327) 58.58%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #339 +/- ## ======================================= Coverage 58.58% 58.58% ======================================= Files 57 57 Lines 2888 2888 ======================================= Hits 1692 1692 Misses 1030 1030 Partials 166 166 ``` | Flag | Coverage Δ | | |---|---|---| | unittests | `58.58% <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=redhat-developer#carryforward-flags-in-the-pull-request-comment) to find out more. Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=redhat-developer). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=redhat-developer)

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[chetan-rns]

@varshab1210 Could you also update the version in the README?

https://github.com/redhat-developer/kam#how-to-contribute

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: wtam2018

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/redhat-developer/kam/blob/master/OWNERS)~~ [wtam2018] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[varshab1210]

/test v4.10-integration-e2e

[varshab1210]

/retest

[varshab1210]

/retest