Use custom path separator for pattern comparisons

As pointed out in gh-33085, the `AntPatternComparator` hardcodes the "/"
separator when checking for "catch all" patterns like "/**".
This commit ensures that the custom path separator is used for those
checks, in order to guarantee consistent comparator results.

See gh-33085

spring-core/src/test/java/org/springframework/util/AntPathMatcherTests.java

@@ -524,6 +524,16 @@ class AntPathMatcherTests {
 		assertThat(comparator.compare("*/**", "*")).isEqualTo(1);
 	}
 
+	@Test
+	void patternComparatorWithDotSeparator() {
+		Comparator<String> comparator = dotSeparatedPathMatcher.getPatternComparator("price.stock.spring");
+
+		assertThat(comparator.compare(null, null)).isEqualTo(0);
+		assertThat(comparator.compare("price.stock.ticker/symbol", "price.stock.ticker/symbol")).isEqualTo(0);
+		assertThat(comparator.compare("price.stock.**", "price.stock.ticker")).isEqualTo(1);
+	}
+
+
 	@Test
 	void patternComparatorSort() {
 		Comparator<String> comparator = pathMatcher.getPatternComparator("/hotels/new");