WIP feat: Add hostname to payload

[adnankobir]

What type of PR is this?

/kind feature

Any specific area of the project related to this PR?

/area config

/area outputs

What this PR does / why we need it:
Adds optional hostname field to the incoming falco payload. Conditionally adds the hostname to all outputs.

Which issue(s) this PR fixes:

Allows sidekick to retrieve hostname once falcosecurity/falco#1520 is resolved.

Special notes for your reviewer:

[poiana]

Welcome @adnankobir! It looks like this is your first PR to falcosecurity/falcosidekick 🎉

[poiana]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: adnankobir
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[Issif]

Hi,
Thank you. As hostname will be a new field, we should add it in all outputs, not only Slack and PagerDuty.

[adnankobir]

Hi, Thank you. As hostname will be a new field, we should add it in all outputs, not only Slack and PagerDuty.

Agreed, let me added it to the remaining outputs.

[Issif]

You can take reference with the PR #310 I did it for source and tags

[adnankobir]

@Issif added to all outputs

[Issif]

/do-not-merge

[Issif]

I saw you closed your PR and why. Do you think this one is still relevant? hostname is listed among other output_fields, we shall not need to create a specific field. Wdyt?

edit: with last version of Falco, it's a dedicated field

[Issif]

Suggested change

	if len(falcopayload.Hostname) != 0 {
	if falcopayload.Hostname != "" {

[Issif]

We added a bunch of new outputs, can you rebase and see if we must add the hostname either, please

[Issif]

Hi,

Can you resolve the conflicts and apply the suggestion I made please, I'm hoping to release the 2.27 in the next 2 weeks

[Issif]

#383 has been merged, this PR is not useful anymore finally.