Update to go 1.19.2

[oliver-goetz]

How to categorize this PR?

/area security
/kind enhancement

What this PR does / why we need it:
Go 1.19.2 is released since last week. It contains three security fixes: ref

Which issue(s) this PR fixes:
Fixes #6788

Release note:

Go is updated to `1.19.2`

[gardener-prow]

@oliver-goetz: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-gardener-check-vulnerabilities	f06c8ca	link	false	/test pull-gardener-check-vulnerabilities

Full PR test history. Your PR dashboard. Command help for this repository.
Please help us cut down on flakes by linking this test failure to an open flake report or filing a new flake report if you can't find an existing one. Also see our testing guideline for how to avoid and hunt flakes.

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[acumino]

/lgtm
/approve

[gardener-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: acumino

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