Remove GraalVM workaround in PathMatchingResourcePatternResolver

[sbrannen]

This is a follow up to #29163.

Once oracle/graal#5080 and oracle/graal#5081 have been resolved (tentatively in GraalVM 22.3), we should be able to remove the following workaround in PathMatchingResourcePatternResolver.

spring-framework/spring-core/src/main/java/org/springframework/core/io/support/PathMatchingResourcePatternResolver.java

Lines 744 to 750 in 6cb131a

	// If the URI is for a "resource" in the GraalVM native image file system, we have to
	// ensure that the root directory does not end in a slash while simultaneously ensuring
	// that the root directory is not an empty string (since fileSystem.getPath("").resolve(str)
	// throws an ArrayIndexOutOfBoundsException in a native image).
	if ("resource".equals(rootDirUri.getScheme()) && (rootDir.length() > 1) && rootDir.endsWith("/")) {
	rootDir = rootDir.substring(0, rootDir.length() - 1);
	}