Update go version for latest CVE findings

[kon-angelo]

What type of PR is this?
/kind feature

What this PR does / why we need it:
Update golang version used for the builder to v1.19.1 to mitigate latest CVEs.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

Go builder updated from 1.18.4 to 1.19.1. 

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: kon-angelo / name: Konstantinos Angelopoulos (660e764)

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[mattcary]

Shouldn't we update to go1.19 to be consistent with the rest of k8s?

[mattcary]

/ok-to-test

[mattcary]

A question, to update go.sum did you do go mod tidy?

[kon-angelo]

@mattcary yes. I did:

go mod tidy
go mod vendor

[mattcary]

thanks!

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kon-angelo, mattcary

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