Added support for AWS IRSA in helm chart

[StevenJDH]

Signed-off-by: Steven Jenkins De Haro 20492442+StevenJDH@users.noreply.github.com

Adds support for AWS IAM Roles for Service Accounts (IRSA) in the helm chart to the KEDA service account. For example, if podIdentity.irsa.enabled is set true along with the needed config, the below will be rendered:

apiVersion: v1
kind: ServiceAccount
...
  annotations:
    eks.amazonaws.com/audience: "sts.amazonaws.com"
    eks.amazonaws.com/role-arn: "arn:aws:iam::000000000000:role/example-irsa-role"
    eks.amazonaws.com/sts-regional-endpoints: "true"
    eks.amazonaws.com/token-expiration: "3600"
...

Checklist

• [ X] Commits are signed with Developer Certificate of Origin (DCO - learn more)
• [ X] A PR is opened to update KEDA core (repo) (if applicable, ie. when deployment manifests are modified)
• [X ] README is updated with new configuration values (if applicable)

Fixes #233

[tomkerkhove]

LGTM, but we'd need to rename the variables

[tomkerkhove]

LGTM, thanks!

[ivanmarquescepsa]

hi, i would need this feature, do you have an estimate of when will it be released?

Thanks!

[hlastraspfx]

Same question: when will it be released? Any news?

[JorTurFer]

Next KEDA release will be around Dec 8th, and it includes the chart. You can check the release dates here