fix: Update workspace name reg exp and workspace config tags reg exp

[nguyen102]

Issue #, if available:
#439
Description of changes:

• Allows user to import Workspaces that have spaces in its name
• Allows user to add Workspace configuration with variables, for example ${indexId}

Checklist:

• Have you successfully deployed to an AWS account with your changes?
• Have you successfully ran unit tests and manual tests with your changes locally?
• Have you written new tests for your core changes, as applicable?

AS review ticket id:

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

[Bingjiling]

LGTM