Add optional description/note for Cloud Manager Environment Variables

[#1]

Request for Feature Enhancement (RFE) Summary:	Environment variables is a good feature in AEMaaCS to change OSGi service configuration in runtime without redeployment. Sometimes, project has to have a lot of env variables, especially if you are running several sites on the same program. That's why I would like to have an option to set a description or note for env variable in the Environment Configuration modal in Cloud Manager.
Use-case:	I can provide few use cases: 1. Imagine you have 2 brand that are running on AEMaaCS. Each of them should pull data from third-party service by schedule. Sometimes there are cases when you need to change a frequency for pulling data for both services or service URL. For example: BRAND1_SERVICE_URL is an env variable with a 3rd party service URL to provide data for brand1, BRAND2_SERVICE_URL is an env variable with a 3rd party service URL to provide data for brand2, BRAND1_SERVICE_CRON is an env variable with a cron expression for brand1 service, BRAND2_SERVICE_CRON is an env variable with a cron expression for brand2 service. I would like to provide some notes for like "3rd-party service for brand 1. Example: https://api.service1.con/api/v1 " or "Every 5 hours: 0 0 */5 * * ? | Every 5 mins: 0 */5 * * * ?". 2. When you need to follow concept of secrets rotation (like for CDN: CDN_PURGEKEY_081324, CDN_PURGEKEY_111324) you can forget about last changed key even if you named it using data format. Some description or note for env variable might help to provide more clarity.
Current/Experienced Behavior:	Currently such option is absent.
Improved/Expected Behavior:	-
Environment Details (AEM version/service pack, any other specifics if applicable):	Cloud Manager Environment Configuration flow
Customer-name/Organization name:
Screenshot (if applicable):	Example of the idea how to render it:
Code package (if applicable):