[tests] Fix KMP test data affected by 9d566465

Affected test data was in a correct state in the corresponding MR branch, but that state was invalidated by the appearance of 9d566465 in the master branch. Because the MR branch in question was created and checked via CI runs before 9d566465 was committed to master, the discrepancy couldn't be caught by MR quality gates.

compiler/testData/diagnostics/tests/multiplatform/JsExternalTypeExtendsActualExternalType.fir.kt

@@ -4,7 +4,7 @@
 
 expect interface ExternalInterface
 
-external class ExternalClass: ExternalInterface
+external class <!EXTERNAL_TYPE_EXTENDS_NON_EXTERNAL_TYPE{METADATA}!>ExternalClass<!>: ExternalInterface
 
 // MODULE: js()()(commonjs)
 // TARGET_PLATFORM: JS

compiler/testData/diagnostics/wasmTests/multiplatform/ActualExternalTypeAsJsInteropType.fir.kt

@@ -4,7 +4,7 @@
 
 expect interface ExternalInterface
 
-external fun externalFunction(arg: ExternalInterface)
+external fun externalFunction(arg: <!WRONG_JS_INTEROP_TYPE{METADATA}!>ExternalInterface<!>)
 
 // MODULE: wasm()()(commonwasm)
 // TARGET_PLATFORM: Wasm