Update tests after switching to LV 2.0

Related to KT-59171

compiler/testData/cli/jvm/jspecifyDefault.out

@@ -1,7 +1,4 @@
-compiler/testData/cli/jvm/jspecifyUsage.kt:2:11: warning: type mismatch: inferred type is Nothing? but String was expected
+compiler/testData/cli/jvm/jspecifyUsage.kt:2:11: error: null can not be a value of a non-null type '@EnhancedNullability kotlin/String'
     a.foo(null)
           ^
-compiler/testData/cli/jvm/jspecifyUsage.kt:3:5: warning: unsafe use of a nullable receiver of type String?
-    a.bar().hashCode()
-    ^
-OK
+COMPILATION_ERROR