Integration tests for utbot-summary functionality

[amandelpie]

Description

We have unit-tests for utbot-summary located in the utbot-summry-tests module. But it checks only intermediate results: itself generated comments/display names/method names, but doesn't check the final result - the generated file with tests, where some information could be erased

Expected behavior

Method processTestCases or its alternative should make double check for generated summaries

Context

Currently, we have a situation where summaries are not added (but could be generated) because of wrong combination of flags in the Summarization.kt, but unit-tests are green

[amandelpie]

Unfortunately, no integration tests are supported for summaries, also the summaries for Fuzzing are not covered with the unit-tests at all.