Add cache to the DNS enricher

[buixor]

What would you like to be added?

not 100% sure it's related to this issue but still:

The DNS enricher method](https://app.crowdsec.net/hub/author/crowdsecurity/configurations/rdns) doesn't support cache. It might have some serious impact and create congestion when users are generating a significant amount of overflows (or it's used in a hotpath). Now that we have added cache for other uses, it should be rather trivial to implement and potentially a lifesaver.

Why is this needed?

so that crowdsec can go brrrr

[github-actions[bot]]

@buixor: Thanks for opening an issue, it is currently awaiting triage.

In the meantime, you can:

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[github-actions[bot]]

@buixor: There are no 'kind' label on this issue. You need a 'kind' label to start the triage process.

• /kind feature
• /kind enhancement
• /kind bug
• /kind packaging

Details

I am a bot created to help the crowdsecurity developers manage community feedback and contributions. You can check out my manifest file to understand my behavior and what I can do. If you want to use this for your project, you can check out the BirthdayResearch/oss-governance-bot repository.

[buixor]

/kind enhancement

[LaurenceJJones]

Linked too #2424