feat(#429): deep profile for deep testing

[h1alexbel]

In this pull I've introduced new maven profile: deep in order to run slow tests (that can be added in the future) only on the CI, while only fast tests will be executed by default.

closes #429

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PR-Codex overview

This PR improves testing by adding a new Maven profile for deep testing, including slow tests.

Detailed summary

• Added a new Maven profile deep for deep testing
• Updated .rultor.yml to include deep profile in Maven command
• Updated workflows to use deep profile in Maven commands
• Added exclusion for slow tests in pom.xml under the deep profile

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[h1alexbel]

@volodya-lombrozo take a look, please

[volodya-lombrozo]

@rultor merge

[rultor]

@rultor merge

@h1alexbel @volodya-lombrozo Can't merge this pull requests, because the file .rultor.yml was modified. This is a security threat. Make a separate pull request with the modification of this particular file and ask project architect to merge it manually.