Openshift installer on azure remove existing resource group tags

4.18 (CAPI installer)

Always

    1. Create resource groups with tags (used to set landing zone)
    2. Install Openshift 4.18

Existing tags removed

Existing tags not removed
No double tagging (see additional info

- This appears starting 4.18 since CAPI is now the default in the installer.
Tagging happens twice today for azure:
The original tagging in https://github.com/openshift/installer/blob/release-4.18/pkg/asset/cluster/azure/azure.go#L124 that correctly retrieves existing tags
The CAPI retagging in https://github.com/openshift/installer/blob/release-4.18/pkg/infrastructure/azure/azure.go#L105 this time it does not retrieve the existing tags (Ultimately it tags twice.

- Furthermore if you look even at the original code comment https://github.com/openshift/installer/blob/release-4.18/pkg/infrastructure/azure/azure.go#L105  it says "The cluster resource group when created by the installer is tagged with " so this is not true here it tags the resourcegroup that we provide as parameter that already exist.

- Workaround; inject tags into installer config