Fix non-selfclosing JSX tag contextual types (#27251)

src/compiler/checker.ts

@@ -16827,6 +16827,12 @@ namespace ts {
         }
 
         function getContextualJsxElementAttributesType(node: JsxOpeningLikeElement) {
+            if (isJsxOpeningElement(node) && node.parent.contextualType) {
+                // Contextually applied type is moved from attributes up to the outer jsx attributes so when walking up from the children they get hit
+                // _However_ to hit them from the _attributes_ we must look for them here; otherwise we'll used the declared type
+                // (as below) instead!
+                return node.parent.contextualType;
+            }
             if (isJsxIntrinsicIdentifier(node.tagName)) {
                 return getIntrinsicAttributesTypeFromJsxOpeningLikeElement(node);
             }