Polish ResourceHintsPredicates

As of #28620, `ResourcePatternHint` exposes its `toRegex` method.
The predicates should use it directly and mirror the exact matching
behavior.

See gh-28555

spring-core/src/test/java/org/springframework/aot/hint/ResourceHintsPredicatesTests.java

@@ -42,7 +42,7 @@ class ResourceHintsPredicatesTests {
 
 	@Test
 	void resourcePatternMatchesResourceName() {
-		this.runtimeHints.resources().registerPattern("/test/spring.*");
+		this.runtimeHints.resources().registerPattern("/test/*");
 		assertPredicateMatches(resources.forResource("/test/spring.properties"));
 	}