Expose GeoIP2 Continent code as variable

[hydrapolic]

What this PR does / why we need it:

We don't have the possibility to access the geoip2 continent code.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation only

Which issue/s this PR fixes

How Has This Been Tested?

We've been using a custom geoip2 stanza with this setting (with GeoLite2). According to https://github.com/maxmind/mmdbinspect, GeoIP2-Country also contains the continent code.

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I've read the CONTRIBUTION guide
• I have added tests to cover my changes.
• All new and existing tests passed.

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• ✅ Tomáš Mózes (8a4e7c5)

[k8s-ci-robot]

@hydrapolic: This issue is currently awaiting triage.

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[k8s-ci-robot]

Hi @hydrapolic. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[hydrapolic]

/check-cla

[rikatz]

/ok-to-test
/lgtm
/approve
Thanks

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hydrapolic, rikatz

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Needs approval from an approver in each of these files:

• OWNERS [rikatz]

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[hydrapolic]

Thank you @rikatz