Ignore NoSuchFileException in TempDir cleanup (#3667)

While walking the temp directory, the file walker may fail to visit a
file that has been removed by another thread or process. In this case,
JUnit should ignore the NoSuchFileException, because there's nothing to
clean up.

Author: gilday

documentation/src/docs/asciidoc/release-notes/release-notes-5.11.0-M1.adoc

@@ -72,6 +72,8 @@ repository on GitHub.
     *** The same applies to other types of test methods (`@TestFactory`,
       `@ParameterizedTest`, etc.) as well as lifecycle methods (`@BeforeAll`,
       `@AfterAll`, `@BeforeEach`, and `@AfterEach`).
+* `TempDir` suppresses `NoSuchFileException` when deleting files that may have been deleted
+  by another thread or process.
 
 [[release-notes-5.11.0-M1-junit-jupiter-deprecations-and-breaking-changes]]
 ==== Deprecations and Breaking Changes

junit-jupiter-engine/src/main/java/org/junit/jupiter/engine/extension/TempDirectory.java

@@ -338,6 +338,9 @@ public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) {
 
 				@Override
 				public FileVisitResult visitFileFailed(Path file, IOException exc) {
+					if (exc instanceof NoSuchFileException) {
+						return CONTINUE;
+					}
 					// IOException includes `AccessDeniedException` thrown by non-readable or non-executable flags
 					resetPermissionsAndTryToDeleteAgain(file, exc);
 					return CONTINUE;