Provide better validation error message for uploaded spec

[amccormi]

Is your feature request related to a problem? Please describe.
I tried to upload an OpenAPI spec file, but it was missing a version (was an empty string). The Upload Spec UI just says "Error in File", but the log message for APIClarity server is much more detailed: "spec validation failed. invalid info: value of version must be a non-empty string. spec validation failed""

Describe the solution you'd like
I'd like to see the more descriptive error make it's way into the UI to provide feedback about what's wrong with the spec file.

Describe alternatives you've considered
Until I found the log message, I had no idea what was wrong, so there wasn't an alternative.