Prior to this commit, the SpringExtension looked up the
TestInstance.Lifecycle and ExecutionMode using
TestContextAnnotationUtils; however, using TestContextAnnotationUtils is
problematic since the TestInstance.Lifecycle and ExecutionMode can be
configured globally via configuration parameters instead of locally via
the @TestInstance and @Execution annotations.
This commit addresses these issues by looking up the
TestInstance.Lifecycle and ExecutionMode via JUnit Jupiter's
ExtensionContext which takes into account both global and local
configuration.
See gh-30020