[BUG][GRADLE PLUGIN] Generate API from a remote URL

Created by: hdani9307

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

If you specify an url for the inputspec parameter, the gradle plugin will fail because it is annotated with @get:InputFile

openapi-generator version

6.2.1

OpenAPI declaration file content or url

Generation Details

Steps to reproduce

Related issues/PRs

Suggest a fix

Remove the @get:InputFile and @PathSensitive(PathSensitivity.RELATIVE annotation use a simple @Input instead