Enable the new, regex-based, wildcard-supporting CODEOWNERS matcher (#5088)

Author: Konrad Jamrozik

tools/code-owners-parser/CodeOwnersParser/CodeownersFile.cs

@@ -8,7 +8,7 @@ namespace Azure.Sdk.Tools.CodeOwnersParser
 {
     public static class CodeownersFile
     {
-        private const bool UseRegexMatcherDefault = false;
+        private const bool UseRegexMatcherDefault = true;
 
         public static List<CodeownersEntry> GetCodeownersEntriesFromFileOrUrl(
             string codeownersFilePathOrUrl)