Front end validation for workflow params from UI based on GQL Schema

[rosibaj]

• at the moment the error handling/reporting on the front end is very basic. It’s just spitting out the details of whatever error it receives from the back-end/API response
• To help users, we would like to prevent malformed request (for example from incorrectly formatted field names or types) so that errors on initiating workflows are prevented.
• Front-end validation of the actual input/workflow params can be garnered from the GQL schema for input params.

Expected behaviour

When i format a workflow request from the input form, the GQL Schema should be used to let me know if i have any malformed options before attempting a run