Avoid duplicate resources in PathMatchingResourcePatternResolver on Windows

This commit updates PathMatchingResourcePatternResolver to avoid
returning duplicate resources on MS Windows when searching using the
`classpath*:` prefix and a wildcard pattern that matches resources
which are directly present in a JAR as well as present via classpath
manifest entries.

See gh-31598
Closes gh-31603

(cherry picked from commit d5874ab)

Author: huyachigege

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

@@ -430,7 +430,8 @@ protected void addClassPathManifestEntries(Set<Resource> result) {
 					int prefixIndex = filePath.indexOf(':');
 					if (prefixIndex == 1) {
 						// Possibly "c:" drive prefix on Windows, to be upper-cased for proper duplicate detection
-						filePath = StringUtils.capitalize(filePath);
+						// to resolve find duplicate jar resource on windows
+						filePath = "/" + StringUtils.capitalize(filePath);
 					}
 					// # can appear in directories/filenames, java.net.URL should not treat it as a fragment
 					filePath = StringUtils.replace(filePath, "#", "%23");