Add support for stability configuration file for the Gradle analyzer

[matejdro]

From what I can see, stability configuration file is currently only used in the IntelliJ plugin. It would be nice if it was also supported in the Gradle analyzer plugin.

[skydoves]

Hi @matejdro, so is this for supporting the stability configuration file for the stability dump/check tasks?

[matejdro]

Yes.

[matejdro]

(Working on a PR for this)