Update year to 2023 in COPYRIGHT_HEADER.txt

This commit is the result of changing the year to 2023 in
COPYRIGHT_HEADER.txt and running all `generate*` tasks in
`generators/build.gradle.kts`.

compiler/tests-java8/tests/org/jetbrains/kotlin/jvm/compiler/LoadJava8TestGenerated.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 

compiler/tests-java8/tests/org/jetbrains/kotlin/jvm/compiler/LoadJava8WithPsiClassReadingTestGenerated.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 

compiler/tests-java8/tests/org/jetbrains/kotlin/jvm/compiler/javac/LoadJava8UsingJavacTestGenerated.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 

compiler/tests-java8/tests/org/jetbrains/kotlin/resolve/calls/EnhancedSignaturesResolvedCallsTestGenerated.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */