Google groups RBAC is not applied for Autopilot clusters

[dhess]

TL;DR

Setting the authenticator_security_group to gke-security-groups@domain.com is ineffective for GKE Autopilot clusters. (This is apparent from looking at the code for the Autopilot modules — the local variables are set, but aren't used in the Terraform resources.)

Expected behavior

The Google Groups for RBAC setting for the cluster should be set as specified in the Terraform config.

Observed behavior

Google Groups for RBAC is not enabled when the cluster is created.

Terraform Configuration

authenticator_security_group = "gke-security-groups@domain.com"

Terraform Version

1.1.8

Additional information

No response

[bharathkkb]

fixed via #1265