Mark operand-expression-wrapping rule as experimental (#3081)

Closes #3080

Author: paul-dingemans

ktlint-ruleset-standard/api/ktlint-ruleset-standard.api

@@ -244,7 +244,7 @@ public final class com/pinterest/ktlint/ruleset/standard/rules/EnumWrappingRuleK
 	public static final fun getENUM_WRAPPING_RULE_ID ()Lcom/pinterest/ktlint/rule/engine/core/api/RuleId;
 }
 
-public final class com/pinterest/ktlint/ruleset/standard/rules/ExpressionOperandWrappingRule : com/pinterest/ktlint/ruleset/standard/StandardRule {
+public final class com/pinterest/ktlint/ruleset/standard/rules/ExpressionOperandWrappingRule : com/pinterest/ktlint/ruleset/standard/StandardRule, com/pinterest/ktlint/rule/engine/core/api/Rule$Experimental {
 	public fun <init> ()V
 	public fun beforeFirstNode (Lcom/pinterest/ktlint/rule/engine/core/api/editorconfig/EditorConfig;)V
 	public fun beforeVisitChildNodes (Lorg/jetbrains/kotlin/com/intellij/lang/ASTNode;Lkotlin/jvm/functions/Function3;)V

ktlint-ruleset-standard/src/main/kotlin/com/pinterest/ktlint/ruleset/standard/rules/ExpressionOperandWrappingRule.kt

@@ -6,6 +6,7 @@ import com.pinterest.ktlint.rule.engine.core.api.ElementType.BINARY_EXPRESSION
 import com.pinterest.ktlint.rule.engine.core.api.ElementType.EOL_COMMENT
 import com.pinterest.ktlint.rule.engine.core.api.ElementType.OPERATION_REFERENCE
 import com.pinterest.ktlint.rule.engine.core.api.IndentConfig
+import com.pinterest.ktlint.rule.engine.core.api.Rule
 import com.pinterest.ktlint.rule.engine.core.api.RuleId
 import com.pinterest.ktlint.rule.engine.core.api.SinceKtlint
 import com.pinterest.ktlint.rule.engine.core.api.SinceKtlint.Status.EXPERIMENTAL
@@ -55,7 +56,8 @@ public class ExpressionOperandWrappingRule :
                 INDENT_SIZE_PROPERTY,
                 INDENT_STYLE_PROPERTY,
             ),
-    ) {
+    ),
+    Rule.Experimental {
     private var indentConfig = IndentConfig.DEFAULT_INDENT_CONFIG
 
     override fun beforeFirstNode(editorConfig: EditorConfig) {