spock2: add test plan filter support

[mihalichzh]

Context

We are using spock 2 as a test runner for one of our test automation frameworks. Recently, we've set up an integration with Allure TestOps and it appears that allure-spock2 doesn't support selective test runs yet. This contribution is aimed to add such feature.

P.S. - logic and unit tests are essentially the same as already implemented for allure-testng and allure-junit-platform integration with a few spock-specific details.

Checklist

• [x] Sign Allure CLA
• [x] Provide unit tests

[CLAassistant]

All committers have signed the CLA.

[mihalichzh]

Hi @baev - sorry for tagging, but is there a chance to review and include this into the next lib version?

[baev]

Yes, you may expect the release early next week

[baev]

@mihalichzh could you please fix the build?

[mihalichzh]

@mihalichzh could you please fix the build?

Hi @baev , should be fixed now - take a look please

[baev]

@mihalichzh thanks!