feat(helm): add extraManifests field

[SozinovD]

implement ability to add arbitrary manifests to release

[burningalchemist]

Hey @SozinovD, thanks for your contribution!

Do you have any particular ideas or use cases on how extraManifests might be used in the sql_exporter helm chart? I believe users might find it useful.

Also, please make sure to check Dev Notes (https://github.com/burningalchemist/sql_exporter/tree/master/helm#dev-notes).

The version in Chart.yaml also needs a bump up, I'd say for the minor value as this a new field.

[SozinovD]

For example i use it with External Secret Operator for automated credentials rotation
I saw extraManifests in kube-prometheus-stack chart, so i consider this a rather good practice

I'll generate docs a bit later, thanks for pointing out

UPD: done with version and docs

[burningalchemist]

@SozinovD, thanks! Yeah, seems a good practice to me too.
Could you please update the version to 0.13.0 instead? I think 0.12.6 might have issues for those trying to upgrade the chart (but we'll see in the pipeline run).

UPD: I'm looking into the pipeline action failure. 👍

[SozinovD]

Yep, changed version to 0.13.0

[burningalchemist]

@SozinovD it's merged, and should be released soon. Thanks! 👍