docs: os image list breakdown

[sean-freeman]

os image list breakdown:

• re-check for consistency of OS naming in Terraform object
• create matrix of OS versions available and the defined Terraform object name

[sean-freeman]

Matrix initial suggestion

Given the length of this list, this would have to exist under /docs

Proposed Terraform Object name to use in future	Cloud Service Provider
sles-12-4	❌ AWS EC2 - GCP VM ✅ IBM Cloud, Intel VS ✅ IBM Cloud, Power VS ❌ Microsoft Azure
sles-12-5	✅ AWS EC2 - GCP VM ❌ IBM Cloud, Intel VS ❌ IBM Cloud, Power VS ✅ Microsoft Azure
sles-15-1	✅ AWS EC2 - GCP VM ✅ IBM Cloud, Intel VS ❌ IBM Cloud, Power VS ✅ Microsoft Azure
sles-15-2	✅ AWS EC2 - GCP VM ✅ IBM Cloud, Intel VS ❌ IBM Cloud, Power VS ✅ Microsoft Azure
sles-15-3	✅ AWS EC2 - GCP VM ✅ IBM Cloud, Intel VS ❌ IBM Cloud, Power VS ✅ Microsoft Azure
rhel-7-6-sap-applications	❌ AWS EC2 - GCP VM ✅ IBM Cloud, Intel VS ❌ IBM Cloud, Power VS ❌ Microsoft Azure
rhel-7-6-sap-hana	✅ AWS EC2 - GCP VM ✅ IBM Cloud, Intel VS ❌ IBM Cloud, Power VS ❌ Microsoft Azure
rhel-7-7-sap-hana	✅ AWS EC2 - GCP VM ❌ IBM Cloud, Intel VS ❌ IBM Cloud, Power VS ❌ Microsoft Azure
rhel-7-9-sap-hana	✅ AWS EC2 - GCP VM ❌ IBM Cloud, Intel VS ❌ IBM Cloud, Power VS ❌ Microsoft Azure
rhel-8-1-sap-applications	❌ AWS EC2 - GCP VM ✅ IBM Cloud, Intel VS ❌ IBM Cloud, Power VS ✅ Microsoft Azure
rhel-8-1-sap-hana	✅ AWS EC2 - GCP VM ✅ IBM Cloud, Intel VS ✅ IBM Cloud, Power VS ✅ Microsoft Azure
rhel-8-2-sap-applications	❌ AWS EC2 - GCP VM ✅ IBM Cloud, Intel VS ❌ IBM Cloud, Power VS ✅ Microsoft Azure
rhel-8-2-sap-hana	✅ AWS EC2 - GCP VM ✅ IBM Cloud, Intel VS ❌ IBM Cloud, Power VS ✅ Microsoft Azure
rhel-8-4-sap-applications	❌ AWS EC2 - GCP VM ✅ IBM Cloud, Intel VS ❌ IBM Cloud, Power VS ✅ Microsoft Azure
rhel-8-4-sap-hana	❌ AWS EC2 - GCP VM ✅ IBM Cloud, Intel VS ❌ IBM Cloud, Power VS ✅ Microsoft Azure