Fix jar uri parsing in CloseablePath

Jar uris follow the format[1]:

```
jar:<url>!/[<entry>]
```

So splitting should be done on the last `!/` rather than the first.

Fixes: #1724 for Spring Boot 3.2 and later.

 1. https://docs.oracle.com/javase/8/docs/api/java/net/JarURLConnection.html

Author: mpkorstanje

junit-platform-commons/src/main/java/org/junit/platform/commons/util/CloseablePath.java

@@ -35,7 +35,7 @@ final class CloseablePath implements Closeable {
 	private static final String FILE_URI_SCHEME = "file";
 	static final String JAR_URI_SCHEME = "jar";
 	private static final String JAR_FILE_EXTENSION = ".jar";
-	private static final String JAR_URI_SEPARATOR = "!";
+	private static final String JAR_URI_SEPARATOR = "!/";
 
 	private static final Closeable NULL_CLOSEABLE = () -> {
 	};
@@ -53,9 +53,11 @@ static CloseablePath create(URI uri) throws URISyntaxException {
 
 	static CloseablePath create(URI uri, FileSystemProvider fileSystemProvider) throws URISyntaxException {
 		if (JAR_URI_SCHEME.equals(uri.getScheme())) {
-			String[] parts = uri.toString().split(JAR_URI_SEPARATOR);
-			String jarUri = parts[0];
-			String jarEntry = parts[1];
+			// Parsing: jar:<url>!/[<entry>]
+			String uriString = uri.toString();
+			int lastJarUriSeparator = uriString.lastIndexOf(JAR_URI_SEPARATOR);
+			String jarUri = uriString.substring(0, lastJarUriSeparator);
+			String jarEntry = uriString.substring(lastJarUriSeparator + 1);
 			return createForJarFileSystem(new URI(jarUri), fileSystem -> fileSystem.getPath(jarEntry),
 				fileSystemProvider);
 		}