Gradle plugin - @Input and @Internal should not be apply on the same property

Created by: vgalloy

Motivation:

In Gradle 7.0 apply @Input and @Internal on property is forbidden. Before Gradle 7.0 applying both on the same property is confusing. According to the documentation:

• @Input: Attached to a task property to indicate that the property specifies some input value for the task.
• @Internal: Attached to a task property to indicate that the property is not to be taken into account for up-to-date checking

Note: Gradle 7.0 is not release yet 2021-03-24

Step to reproduce

build.gradle.kts

plugins {
  id("org.openapi.generator") version ("5.1.0")
}

with the command line ./gradlew openApiGenerate will cause

Type 'GenerateTask' property 'input' annotated with @Internal should not be also annotated with @Input.
    
    Reason: A property is ignored but also has input annotations.
    
    Possible solutions:
      1. Remove the input annotations.
      2. Remove the @Internal annotation.