feat(falco-exporter): added ability to set the grafana folder annotation name

[dotdc]

What type of PR is this?

Uncomment one (or more) /kind <> lines:

/kind feature

If this PR will release a new chart version please make sure to also uncomment the following line:

/kind chart-release

Any specific area of the project related to this PR?

Uncomment one (or more) /area <> lines:

/area falco-exporter-chart

What this PR does / why we need it:

This PR adds the ability to set the grafana folder annotation name used by the Grafana sidecar. This is useful when using folderAnnotation in the Grafana Helm Chart. Set the default value to the previously hardcoded one.

Which issue(s) this PR fixes:

N/A

Special notes for your reviewer:

Checklist

• [X] Chart Version bumped
• [X] Variables are documented in the README.md
• [X] CHANGELOG.md updated

[poiana]

Welcome @dotdc! It looks like this is your first PR to falcosecurity/charts 🎉

[poiana]

LGTM label has been added.

Git tree hash: be671b5885f8f98acd2d322e09b712563427d403

[poiana]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alacuku, dotdc

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/falcosecurity/charts/blob/master/OWNERS)~~ [alacuku] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment