fix: Add type names to custom parameter types

[Leo10Gama]

Why is this change necessary?

Since the SAM CLI uses custom types without names, we had to create a constant to map the name of the parameter to its set of possible values. This creates additional overhead when creating new custom parameter types.

How does it address the issue?

The name fields of each of these types have now been populated, and as such, they are able to be read by the schema parser. This means we can include the expected type (or types) of the parameter to be read.

What side effects does this change have?

The name field of each SAM CLI custom type has been populated instead of being an empty string (not that it was being used to begin with).

Mandatory Checklist

PRs will only be reviewed after checklist is complete

• Add input/output type hints to new functions/methods
• Write design document if needed (Do I need to write a design document?)
• Write/update unit tests
• Write/update integration tests
• Write/update functional tests if needed
• make pr passes
• make update-reproducible-reqs if dependencies were changed
• Write documentation

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.