Extend Java API for Spring-aware generation

[denis-fokin]

Description

Fixes #2613

Add more info if needed:

• context/purpose for implementing changes
• detailed description of the changes made

How to test

Implement some simple logic or execute the automated example.

Automated tests

utbot-spring-test/src/test/java/org/utibot/examples/spring/SpringUtBotJavaApiTest.java

Manual tests

No manual tests

Self-check list

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[IlyaMuravjov]

UtBotJavaApi.generate() method should also accept ApplicationContext, it should be the same applicationContext instance that was earlier passed to generateTestSets() or fuzzingTestSets(), preferably to guarantee that same applicationContext instance is used for both methods it should be injected into UtBotJavaApi via a constructor and not individually passed to every method.

CodeGenerator should be created with applicationContext.createCodeGenerator(...) (similarly to how it's done in EngineProcessMain), UtExecutionInstrumentation.Factory for ConcreteExecutor should be created with applicationContext.createConcreteExecutionContext(...).instrumentationFactory (simillarly to how it's done TestCaseGenerator).

[Markoutte]

Looks good to me