1c69a3c521
Update `PathMatchingResourcePatternResolver` so that in addition to searching the `java.class.path` system property for classpath enties, it also searches the `MANIFEST.MF` files from within those jars. Prior to this commit, the `addClassPathManifestEntries()` method expected that the JVM had added `Class-Path` manifest entries to the `java.class.path` system property, however, this did not always happen. The updated code now performs a deep search by loading `MANIFEST.MF` files from jars discovered from the system property. To deal with potential performance issue, loaded results are also now cached. The updated code has been tested with Spring Boot 3.3 jars extracted using `java -Djarmode=tools`. See gh-33705
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