Improve performance of Tomcat 'jar:war:file' URLs

Update jar `Handler` fallback logic to directly support Tomcat
'jar:war:file' URLs. This commit allows contents to be accessed without
the JDK needing to extracted the nested jar to the temporary folder.

Closes gh-24553

spring-boot-tests/spring-boot-integration-tests/spring-boot-loader-tests/src/intTest/java/org/springframework/boot/loader/LoaderIntegrationTests.java

@@ -59,8 +59,9 @@ class LoaderIntegrationTests {
 
 	@Test
 	void readUrlsWithoutWarning() {
+		System.out.println(output.toUtf8String());
 		assertThat(output.toUtf8String()).contains(">>>>> 287649 BYTES from").doesNotContain("WARNING:")
-				.doesNotContain("illegal");
+				.doesNotContain("illegal").doesNotContain("jar written to temp");
 	}
 
 }