[POR-396] 2 new drivers for porter apply for env groups and random string

[mnafees]

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Other (please describe):

Pull request checklist

Please check if your PR fulfills the following requirements:

• If it's a backend change, tests for the changes have been added and go test ./... runs successfully from the root folder.
• If it's a frontend change, Prettier has been run
• Docs have been reviewed and added / updated if needed

What is the current behavior?

N/A

What is the new behavior?

2 new drivers for porter apply:

• env-group for creating or updating env groups
• random-string to generate a random string

Technical Spec/Implementation Notes