Add support for Gradle 7 configurations

What does this MR do?

Gradle version 7.x dependencies are not handled properly with license-gradle-plugin 0.15.0. It does not return any licenses that utilize the implementation scope (compile is deprecated). For this to work with Gradle 7.x projects, we need to update to 0.16.1 and configure the downloadLicenses task.

downloadLicenses {
    dependencyConfiguration = 'runtimeClasspath'
}

dependencyConfiguration is required for it to properly scope dependencies using implementation and testImplementation in the gradle.build file.

i.e.,

dependencies {
	implementation 'org.springframework.boot:spring-boot-starter-websocket'
}

What are the relevant issue numbers?

gitlab-org/gitlab#341222 (closed)

Does this MR meet the acceptance criteria?

• Changelog entry added
• Documentation created/updated for GitLab EE, if necessary
• Documentation created/updated for this project, if necessary
• Documentation reviewed by technical writer or follow-up review issue created
• Tests added for this feature/bug
• Job definition updated, if necessary
  • Job definition example
  • CI Templates (to be removed)
  • Vendored CI Templates (also in CE)
  • Ensure that all of the ENV vars supported are propagated to Docker containers upon docker run in job definitions
• Conforms to the code review guidelines
• Security reports checked/validated by reviewer