chore: speed up rultor by using fast image

[volodya-lombrozo]

In this pr I used lombrozo/rultor-image-java:pr-3 image for rultor. The previous rultor run took around 28 minutes. With the new image rultor runs will take around 6 minutes in average (depending on integration tests in the project).

---

PR-Codex overview

This PR updates the Docker image in .rultor.yml and adds MAVEN_OPTS in the release script.

Detailed summary

• Updated Docker image to lombrozo/rultor-image-java:pr-3
• Added MAVEN_OPTS in the release script to configure Java module access restrictions.

✨ Ask PR-Codex anything about this PR by commenting with /codex {your question}

[volodya-lombrozo]

@maxonfjvipon Could you take a look, please? Most probably you will need to merge that changes manually.