Ensure vanilla Java applications produced by `gradle init` work with Isolated Projects out of the box about gradle

[6hundreds]

Confirmed that introducing IP violation in project structure is being catched by tests in :build-init

[6hundreds]

@bamboo gradle init generates project with kotlin-gradle-plugin = "1.9.22", so it fixed, just checked.
At the same time, we could have integTests for that configuration-cache project - like a run gradle init with a set of options and run help with IP enabled. WDYT?

[bamboo]

@6hundreds Yes, we should have integ tests for gradle init compatibility with Isolated Projects but I think they should be together with the gradle init implementation, not with the configuration-cache implementation.

[6hundreds]

@bamboo We have IP-specific tests for, say, JavaPlugin in CC project, and some other things. Placing that tests to another project will make us to expose test fixtures.

Also, doesn't this tests has to be in smoke-ide-tests? Since it will exercise a sync process

[6hundreds]

Fixed via #29254

[bamboo]

Great!