Also allow tracking traversal direction

= vue tags can have empty body and be self-closing
WEB-30808 Some of the vue components may have an empty body

update PostCSSPluginCheckTest, PluginTestCase

context is required to correctly shorten names and reformat (IDEA-182071)

poly conditional expression receives type from context, if context contains errors, it's better to highlight those first (IDEA-185540)

Use CustomJUnit4TestAdapterCache from ant-junit4.jar which properly propagates events about ignored tests and assumption violations.

The new formatter was introduced to support ignored tests (TW-2288), we need to use that new formatter if it wasn't added by TeamCity automatically.

'intellij.platform.boot' module needs to be in the application classpath when running tests, so it must be in dependencies of 'intellij.tools.testsBootstrap' module (see org.jetbrains.intellij.build.impl.TestingTasksImpl.runTestsProcess).

Used in ToArrayCallWithZeroLengthArrayArgumentInspection and StreamApiMigrationInspection

728d3dca follow-up