Deprecate Regex.matcher() with ERROR and provide the replacement.

libraries/stdlib/src/kotlin/text/regex/RegexJVM.kt

@@ -116,7 +116,7 @@ public class Regex internal constructor(private val nativePattern: Pattern) {
     /** The set of options that were used to create this regular expression.  */
     public val options: Set<RegexOption> = fromInt(nativePattern.flags())
 
-    @Deprecated("To get the Matcher from java.util.regex.Pattern use toPattern to convert string to Pattern, or migrate to Regex API")
+    @Deprecated("To get the Matcher from java.util.regex.Pattern use toPattern to convert string to Pattern, or migrate to Regex API", ReplaceWith("toPattern().matcher(input)"), DeprecationLevel.ERROR)
     public fun matcher(input: CharSequence): Matcher = nativePattern.matcher(input)
 
     /** Indicates whether the regular expression matches the entire [input]. */

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/internal/AnnotationProcessingManager.kt

@@ -313,7 +313,7 @@ public class AnnotationProcessingManager(
 
         fun processLines(lines: Sequence<String>) {
             for (line in lines) {
-                if (line.isBlank() || !JAVA_FQNAME_PATTERN.matcher(line).matches()) continue
+                if (line.isBlank() || !JAVA_FQNAME_PATTERN.matches(line)) continue
                 annotationProcessors.add(line)
             }
         }