Commit d1b65f6d3e introduced a regression for the handling of
NoClassDefFoundError when skipping a TestExecutionListener that cannot
be loaded. Specifically, the DEBUG log message changed and included the
stack trace; whereas, it previously did not include the stack trace.
This commit consistently handles NoClassDefFoundError for a skipped
TestExecutionListener, whether a default listener or a listener
registered via @TestExecutionListeners and aligns with the previous
behavior by omitting the stack trace for a NoClassDefFoundError.
Closes gh-28962
8fe6a9f537