Prior to this commit, dependency injection of all arguments in a test class constructor invoked by JUnit Jupiter was only possible if the constructor was explicitly annotated with @Autowired. This commit introduces support for a configurable "test constructor autowire" mode which defaults to false in order to remain backwards compatible. Specifically, this mode can be configured globally for an entire test suite via a new "spring.test.constructor.autowire" JVM system property that can alternatively be configured via the SpringProperties mechanism. In addition, the global "test constructor autowire" mode can be overridden locally on a per-class basis via the new @TestConstructor annotation. Closes gh-22286
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