fix config controller list - documentation #743

[fmichaelobrien]

Test results on https://github.com/GoogleCloudPlatform/pubsec-declarative-toolkit/issues/743

before

• via https://github.com/GoogleCloudPlatform/pubsec-declarative-toolkit/tree/main/docs/landing-zone-v2#gitops "If you have forgotten the name of the instance you can run gcloud config controller list to reveal the instances in your project." to "If you have forgotten the name of the instance you can run gcloud anthos config controller list to reveal the instances in your project."

  admin_@cloudshell:~/pdt-arg (pdt-arg-kcc11)$ gcloud config controller list
  ERROR: (gcloud.config) Invalid choice: 'controller'.
  Maybe you meant:
  gcloud anthos
  gcloud config

After - gcloud testing

• same as https://github.com/GoogleCloudPlatform/pubsec-declarative-toolkit/blob/gh446-hub/solutions/setup.sh#L203

  admin_@cloudshell:~/pdt-arg (pdt-arg)$ gcloud config set project pdt-arg-kcc11
  Updated property [core/project].
  admin_@cloudshell:~/pdt-arg (pdt-arg-kcc11)$ gcloud anthos config controller list
  NAME: pdt-arg
  LOCATION: northamerica-northeast1
  STATE: RUNNING

Alternate gcloud references verified

• no delete section = ok - https://github.com/ssc-spc-ccoe-cei/gcp-tools/blob/main/scripts/bootstrap/setup-kcc.sh
• ok - https://github.com/GoogleCloudPlatform/pubsec-declarative-toolkit/blob/gh446-hub/solutions/setup.sh#L203

[fmichaelobrien]

thanks for the merge, I would like to keep the PR up for larger community review usually and merge within 24-48h unless the PR is critical or part of a pending release

updated procedure to put in a comment to keep the PR open - here https://github.com/GoogleCloudPlatform/pubsec-declarative-toolkit/wiki/Contributor-Onboarding-Agreement#coa-2-pull-request-recommendations