1. Proposed title of this feature request

• Allow ROSA CLI to validate tags that include space in the key/value

2. What is the nature and description of the request?

• Currently the UserTagValidator function only allows tags that are in following format: "Key Value" not allowing customers to use keys and/or values that include spaces
• Neither of the variations below work:

$ rosa create cluster --cluster-name cluster-test --sts --tags "'app':'core platform'" 
$ rosa create cluster --cluster-name cluster-test --sts --tags "'app'='core platform'"
$ rosa create cluster --cluster-name cluster-test --sts --tags "'app' 'core platform'"

The all throw an error similar to this:

E: invalid tag format for tag '['app' 'core platform']'. Expected tag format: 'key value' 

• Spaces in tags are supported according to AWS tag convention (AWS doc link)

3. Why does the customer need this? (List the business requirements here)

• Customers may have automation in place for existing tags that include spaces and want those tags applied to rosa resources