PY-76877 Conformance test failure: overloads_basic.py

PySliceExpression is replaced by PySubscriptionExpression in AST.
PySliceItem is returned by PySubscriptionExpression.getIndexExpression(). For that purpose PySliceItem is now a PyExpression of type `builtins.slice`.

GitOrigin-RevId: 9aa8de13ef7c51741e248317c5264b3a06ffb9bf

python/python-ast/src/com/jetbrains/python/ast/PyAstAssignmentStatement.java

@@ -74,8 +74,7 @@ public interface PyAstAssignmentStatement extends PyAstStatement, PyAstNamedElem
       if (raw ||
           expr instanceof PyAstTargetExpression ||
           expr instanceof PyAstReferenceExpression ||
-          expr instanceof PyAstSubscriptionExpression ||
-          expr instanceof PyAstSliceExpression) {
+          expr instanceof PyAstSubscriptionExpression) {
         targets.add(expr);
       }
     }

python/python-ast/src/com/jetbrains/python/ast/PyAstSliceExpression.java

@@ -8,6 +8,8 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 
+@SuppressWarnings("MissingDeprecatedAnnotation")
+@Deprecated(forRemoval = true)
 @ApiStatus.Experimental
 public interface PyAstSliceExpression extends PyAstExpression {
   default @NotNull PyAstExpression getOperand() {

python/python-ast/src/com/jetbrains/python/ast/PyAstSliceItem.java

@@ -7,7 +7,7 @@ import org.jetbrains.annotations.Nullable;
 
 
 @ApiStatus.Experimental
-public interface PyAstSliceItem extends PyAstElement {
+public interface PyAstSliceItem extends PyAstExpression {
   default @Nullable PyAstExpression getLowerBound() {
     return childToPsi(PythonDialectsTokenSetProvider.getInstance().getExpressionTokens(), 0);
   }