feat(userspace/outputs_http): Add option for mTLS

[annadorottya]

What type of PR is this?

/kind feature

Any specific area of the project related to this PR?

/area engine

What this PR does / why we need it: Currently there is no mTLS option for the HTTP output, it would be more secure to have this feature.

Which issue(s) this PR fixes:

Fixes #2632

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

new(falco/config): add new configurations for http_output that allow mTLS

[poiana]

Welcome @annadorottya! It looks like this is your first PR to falcosecurity/falco 🎉

[jasondellaluce]

cc @alacuku

[jasondellaluce]

/milestone 0.36.0

[incertum]

This seems very useful, are we on track to allocate time for review and feature finalization? Thank you! @leogr?

[leogr]

This seems very useful, are we on track to allocate time for review and feature finalization? Thank you! @leogr?

I agree this is useful. I believe we are still in time. Let's try to merge this for Falco 0.36.
cc @Andreagit97 @FedeDP

[Andreagit97]

I've tested it and it works, thank you for this! @annadorottya Could you rebase on master please?

[poiana]

LGTM label has been added.

Git tree hash: 7903895bbe2dce8dbb042516d8f705665a24e562

[annadorottya]

Sorry I accidentally merged the master branch into my branch, which removed the lgtm and approved labels, can you approve again @leogr ? 🙇

[incertum]

No worries even with a direct rebase all previous approvals are removed. Leo and Andrea will approve tomorrow Europe time.

[Andreagit97]

/approve
Thank you!

[poiana]

LGTM label has been added.

Git tree hash: bfbf0dcf5fb2b62eb67aabb9dbd79efde8304ef3

[FedeDP]

/approve

[poiana]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Andreagit97, annadorottya, FedeDP

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [Andreagit97,FedeDP]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment